diff --git a/hplip-qmsgbox-typos.patch b/hplip-qmsgbox-typos.patch
new file mode 100644
index 0000000..4a64668
--- /dev/null
+++ b/hplip-qmsgbox-typos.patch
@@ -0,0 +1,68 @@
+commit 7623eb3c83d91405471177d750ab0ae8fd05a0d6
+Author: Tomas Korbar <tkorbar@redhat.com>
+Date:   Mon Oct 1 16:27:36 2018 +0200
+
+    Fix typos in QMessageBox constructors
+
+diff --git a/ui5/devmgr5.py b/ui5/devmgr5.py
+index 35bdcb7..267cfba 100644
+--- a/ui5/devmgr5.py
++++ b/ui5/devmgr5.py
+@@ -139,8 +139,7 @@ class PluginInstall(QObject):
+             install_plugin = QMessageBox.warning(self.parent,
+                                 self.parent.windowTitle(),
+                                 self.__tr("<b>The HPLIP plugin is already installed.</b><p>Do you want to continue and re-install it?"),
+-                                QMessageBox.Yes,
+-                                QMessageBox.No,
++                                QMessageBox.Yes | QMessageBox.No,
+                                 QMessageBox.NoButton) == QMessageBox.Yes
+ 
+         if install_plugin:
+@@ -149,8 +148,7 @@ class PluginInstall(QObject):
+                 QMessageBox.critical(self.parent,
+                     self.parent.windowTitle(),
+                     self.__tr("<b>Unable to find an appropriate su/sudo utility to run hp-plugin.</b><p>Install kdesu, gnomesu, or gksu.</p>"),
+-                    QMessageBox.Ok,
+-                    QMessageBox.NoButton,
++                    QMessageBox.Ok | QMessageBox.NoButton,
+                     QMessageBox.NoButton)
+ 
+ 
+diff --git a/ui5/nodevicesdialog.py b/ui5/nodevicesdialog.py
+index 6083f6d..ca86bfc 100644
+--- a/ui5/nodevicesdialog.py
++++ b/ui5/nodevicesdialog.py
+@@ -64,8 +64,7 @@ class NoDevicesDialog(QDialog, Ui_NoDevicesDialog_base):
+             QMessageBox.critical(self,
+                                     self.windowTitle(),
+                                     self.__tr("<b>An error occurred.</b><p>Please re-start the Device Manager and try again."),
+-                                    QMessageBox.Ok,
+-                                    QMessageBox.NoButton,
++                                    QMessageBox.Ok | QMessageBox.NoButton,
+                                     QMessageBox.NoButton)
+ 
+ 
+diff --git a/ui5/setupdialog.py b/ui5/setupdialog.py
+index fbfe5ac..05e2b1d 100644
+--- a/ui5/setupdialog.py
++++ b/ui5/setupdialog.py
+@@ -1108,8 +1108,7 @@ class SetupDialog(QDialog, Ui_Dialog):
+                     if QMessageBox.critical(self,
+                                            self.windowTitle(),
+                                            error_text,
+-                                           QMessageBox.Retry | QMessageBox.Default,
+-                                           QMessageBox.Cancel | QMessageBox.Escape,
++                                           QMessageBox.Retry | QMessageBox.Default | QMessageBox.Cancel | QMessageBox.Escape,
+                                            QMessageBox.NoButton) == QMessageBox.Cancel:
+                         break
+ 
+@@ -1138,8 +1137,7 @@ class SetupDialog(QDialog, Ui_Dialog):
+                                 if QMessageBox.critical(self,
+                                                        self.windowTitle(),
+                                                        error_text,
+-                                                       QMessageBox.Retry | QMessageBox.Default,
+-                                                       QMessageBox.Cancel | QMessageBox.Escape,
++                                                       QMessageBox.Retry | QMessageBox.Default | QMessageBox.Cancel | QMessageBox.Escape,
+                                                        QMessageBox.NoButton) == QMessageBox.Cancel:
+                                     break
+ 
diff --git a/hplip.spec b/hplip.spec
index 47055e0..2ad10db 100644
--- a/hplip.spec
+++ b/hplip.spec
@@ -7,7 +7,7 @@
 Summary: HP Linux Imaging and Printing Project
 Name: hplip
 Version: 3.18.6
-Release: 8%{?dist}
+Release: 9%{?dist}
 License: GPLv2+ and MIT and BSD and IJG and Public Domain and GPLv2+ with exceptions and ISC
 
 Url: https://developers.hp.com/hp-linux-imaging-and-printing
@@ -52,6 +52,7 @@ Patch32: hplip-colorlaserjet-mfp-m278-m281.patch
 Patch33: hplip-error-print.patch
 Patch34: hplip-hpfax-importerror-print.patch
 Patch35: hplip-wifisetup.patch
+Patch36: hplip-qmsgbox-typos.patch
 
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 Requires: python3-pillow
@@ -271,6 +272,12 @@ rm prnt/hpcups/ErnieFilter.{cpp,h} prnt/hpijs/ernieplatform.h
 # bug caused by typo in wifisetupdialog wifiObj property call
 %patch35 -p1 -b .wifisetup-bad-call-fix
 
+# TypeError: argument 5 has unexpected type 'StandardButtons' (bug #1594602)
+# upstream bug: https://bugs.launchpad.net/ubuntu/+source/hplip/+bug/1745383
+# bug caused by typo in QMessageBox constructor call
+# this patch fixes more of those typos
+%patch36 -p1 -b .qmsgbox-typos-fix
+
 sed -i.duplex-constraints \
     -e 's,\(UIConstraints.* \*Duplex\),//\1,' \
     prnt/drv/hpcups.drv.in
@@ -556,6 +563,9 @@ rm -f %{buildroot}%{_sysconfdir}/xdg/autostart/hplip-systray.desktop
 %config(noreplace) %{_sysconfdir}/sane.d/dll.d/hpaio
 
 %changelog
+* Mon Oct 01 2018 Tomas Korbar <tkorbar@redhat.com> - 3.18.6-9
+- 1594602 - Fix typos in QMessageBox constructor calls
+
 * Mon Oct 01 2018 Tomas Korbar <tkorbar@redhat.com> - 3.18.6-8 
 - 1626877 - Fix AttributeError when connecting to printer via wifi