diff --git a/alsa-tools-c99.patch b/alsa-tools-c99.patch
new file mode 100644
index 0000000..ef07ed0
--- /dev/null
+++ b/alsa-tools-c99.patch
@@ -0,0 +1,132 @@
+Submitted upstream: <https://github.com/alsa-project/alsa-tools/pull/17>
+
+diff --git a/echomixer/echomixer.c b/echomixer/echomixer.c
+index 4946a5ddd5de6790..80124baefa6608f3 100644
+--- a/echomixer/echomixer.c
++++ b/echomixer/echomixer.c
+@@ -2105,7 +2105,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+     for (i=0; i<ndmodes; i++) {
+       menuitem=gtk_menu_item_new_with_label(dmodeName[i]);
+       gtk_widget_show(menuitem);
+-      gtk_signal_connect(GTK_OBJECT(menuitem), "activate", Digital_mode_activate, (gpointer)(long)i);
++      gtk_signal_connect(GTK_OBJECT(menuitem), "activate", G_CALLBACK(Digital_mode_activate), (gpointer)(long)i);
+       gtk_menu_append(GTK_MENU(menu), menuitem);
+     }
+     gtk_option_menu_set_menu(GTK_OPTION_MENU(dmodeOpt), menu);
+@@ -2131,7 +2131,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+       clocksrc_menuitem[i]=gtk_menu_item_new_with_label(clocksrcName[i]);
+       gtk_widget_show(clocksrc_menuitem[i]);
+       gtk_widget_set_sensitive(clocksrc_menuitem[i], FALSE);
+-      gtk_signal_connect(GTK_OBJECT(clocksrc_menuitem[i]), "activate", Clock_source_activate, (gpointer)(long)i);
++      gtk_signal_connect(GTK_OBJECT(clocksrc_menuitem[i]), "activate", G_CALLBACK(Clock_source_activate), (gpointer)(long)i);
+       gtk_menu_append(GTK_MENU(menu), clocksrc_menuitem[i]);
+     }
+     gtk_option_menu_set_menu(GTK_OPTION_MENU(clocksrcOpt), menu);
+@@ -2157,7 +2157,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+     for (i=0; i<nspdifmodes; i++) {
+       menuitem=gtk_menu_item_new_with_label(spdifmodeName[i]);
+       gtk_widget_show(menuitem);
+-      gtk_signal_connect(GTK_OBJECT(menuitem), "activate", SPDIF_mode_activate, (gpointer)(long)i);
++      gtk_signal_connect(GTK_OBJECT(menuitem), "activate", G_CALLBACK(SPDIF_mode_activate), (gpointer)(long)i);
+       gtk_menu_append(GTK_MENU(menu), menuitem);
+     }
+     gtk_option_menu_set_menu(GTK_OPTION_MENU(spdifmodeOpt), menu);
+@@ -2182,7 +2182,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+       gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, FALSE, 0);
+       ReadControl(&i, 1, PhantomPower.id, SND_CTL_ELEM_IFACE_MIXER);
+       gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), i);
+-      gtk_signal_connect(GTK_OBJECT(button), "toggled", Switch_toggled, (gpointer)&PhantomPower);
++      gtk_signal_connect(GTK_OBJECT(button), "toggled", G_CALLBACK(Switch_toggled), (gpointer)&PhantomPower);
+       PhantomPower.Button=button;
+     }
+ 
+@@ -2193,7 +2193,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+       gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, FALSE, 0);
+       ReadControl(&i, 1, Automute.id, SND_CTL_ELEM_IFACE_CARD);
+       gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), i);
+-      gtk_signal_connect(GTK_OBJECT(button), "toggled", Switch_toggled, (gpointer)&Automute);
++      gtk_signal_connect(GTK_OBJECT(button), "toggled", G_CALLBACK(Switch_toggled), (gpointer)&Automute);
+       Automute.Button=button;
+     }
+ 
+@@ -2202,7 +2202,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+       autoclockChkbutton=gtk_check_button_new_with_label("Autoclock");
+       gtk_widget_show(autoclockChkbutton);
+       gtk_box_pack_start(GTK_BOX(hbox), autoclockChkbutton, TRUE, FALSE, 0);
+-      gtk_signal_connect(GTK_OBJECT(autoclockChkbutton), "toggled", AutoClock_toggled, NULL);
++      gtk_signal_connect(GTK_OBJECT(autoclockChkbutton), "toggled", G_CALLBACK(AutoClock_toggled), NULL);
+       AutoClock=-1;
+     }
+   }
+@@ -2672,7 +2672,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+   gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 0);
+   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), 1);
+   gtk_widget_show(button);
+-  gtk_signal_connect(GTK_OBJECT(button), "toggled", Gang_button_toggled, 0);
++  gtk_signal_connect(GTK_OBJECT(button), "toggled", G_CALLBACK(Gang_button_toggled), 0);
+ 
+   // Controls frame
+   frame=gtk_frame_new("Controls");
+@@ -2687,7 +2687,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+     button=gtk_toggle_button_new_with_label("VU");
+     gtk_widget_show(button);
+     gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 1);
+-    gtk_signal_connect(GTK_OBJECT(button), "toggled", VUmeters_button_click, 0);
++    gtk_signal_connect(GTK_OBJECT(button), "toggled", G_CALLBACK(VUmeters_button_click), 0);
+     VUw_geom.toggler=button;
+     if (VUw_geom.st==1)
+       gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), TRUE);
+@@ -2697,7 +2697,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+   button=gtk_toggle_button_new_with_label("Line");
+   gtk_widget_show(button);
+   gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 1);
+-  gtk_signal_connect(GTK_OBJECT(button), "toggled", ToggleWindow, (gpointer)LVwindow);
++  gtk_signal_connect(GTK_OBJECT(button), "toggled", G_CALLBACK(ToggleWindow), (gpointer)LVwindow);
+   LVw_geom.toggler=button;
+   if (LVw_geom.st==1)
+     gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), TRUE);
+@@ -2707,7 +2707,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+     button=gtk_toggle_button_new_with_label("Misc");
+     gtk_widget_show(button);
+     gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 1);
+-    gtk_signal_connect(GTK_OBJECT(button), "toggled", ToggleWindow, (gpointer)Miscwindow);
++    gtk_signal_connect(GTK_OBJECT(button), "toggled", G_CALLBACK(ToggleWindow), (gpointer)Miscwindow);
+     Miscw_geom.toggler=button;
+     if (Miscw_geom.st==1)
+       gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), TRUE);
+@@ -2718,7 +2718,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+     button=gtk_toggle_button_new_with_label("GrMix");
+     gtk_widget_show(button);
+     gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 1);
+-    gtk_signal_connect(GTK_OBJECT(button), "toggled", GMixer_button_click, 0);
++    gtk_signal_connect(GTK_OBJECT(button), "toggled", G_CALLBACK(GMixer_button_click), 0);
+     GMw_geom.toggler=button;
+     if (GMw_geom.st==1)
+       gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), TRUE);
+@@ -2727,7 +2727,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+     button=gtk_toggle_button_new_with_label("Mixer");
+     gtk_widget_show(button);
+     gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 1);
+-    gtk_signal_connect(GTK_OBJECT(button), "toggled", ToggleWindow, (gpointer)mixerControl.window);
++    gtk_signal_connect(GTK_OBJECT(button), "toggled", G_CALLBACK(ToggleWindow), (gpointer)mixerControl.window);
+     Mixerw_geom.toggler=button;
+     if (Mixerw_geom.st==1)
+       gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), TRUE);
+@@ -2738,7 +2738,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+     button=gtk_toggle_button_new_with_label("Vmixer");
+     gtk_widget_show(button);
+     gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 1);
+-    gtk_signal_connect(GTK_OBJECT(button), "toggled", ToggleWindow, (gpointer)vmixerControl.window);
++    gtk_signal_connect(GTK_OBJECT(button), "toggled", G_CALLBACK(ToggleWindow), (gpointer)vmixerControl.window);
+     Vmixerw_geom.toggler=button;
+     if (Vmixerw_geom.st==1)
+       gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), TRUE);
+@@ -2749,7 +2749,7 @@ printf("components = %s\n", snd_ctl_card_info_get_components(hw_info));*/
+     button=gtk_toggle_button_new_with_label("PCM");
+     gtk_widget_show(button);
+     gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 1);
+-    gtk_signal_connect(GTK_OBJECT(button), "toggled", ToggleWindow, (gpointer)pcmoutControl.window);
++    gtk_signal_connect(GTK_OBJECT(button), "toggled", G_CALLBACK(ToggleWindow), (gpointer)pcmoutControl.window);
+     PVw_geom.toggler=button;
+     if (PVw_geom.st==1)
+       gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), TRUE);
diff --git a/alsa-tools.spec b/alsa-tools.spec
index 220551f..75069ba 100644
--- a/alsa-tools.spec
+++ b/alsa-tools.spec
@@ -25,7 +25,7 @@
 Summary:        Specialist tools for ALSA
 Name:           alsa-tools
 Version:        1.2.5
-Release:        9%{?dist}
+Release:        10%{?dist}
 
 # Checked at least one source file from all the sub-projects contained in
 # the source tarball and they are consistent GPLv2+ - TJ 2007-11-15
@@ -36,6 +36,7 @@ Source:         ftp://ftp.alsa-project.org/pub/tools/%{name}-%{version}.tar.bz2
 Source1:        90-alsa-tools-firmware.rules
 
 Patch1:         hwmixvolume-python.patch
+Patch2: alsa-tools-c99.patch
 
 BuildRequires:  gcc gcc-c++
 BuildRequires:  alsa-lib-devel >= %{version}
@@ -93,6 +94,7 @@ The following tools are available:
 %prep
 %setup -q -n %{name}-%{version}
 %patch1 -p1 -b .hwmixvolume-python
+%patch -P 2 -p1
 
 %build
 mv seq/sbiload . ; rm -rf seq
@@ -201,6 +203,9 @@ install -m 644 %{SOURCE1} %{buildroot}/lib/udev/rules.d
 %endif
 
 %changelog
+* Tue Jan 09 2024 Florian Weimer <fweimer@redhat.com> - 1.2.5-10
+- Fix C type errors using G_CALLBACK
+
 * Wed Jul 19 2023 Fedora Release Engineering <releng@fedoraproject.org> - 1.2.5-9
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild