diff --git a/hplip-configure-python.patch b/hplip-configure-python.patch
index b119212..0f6b713 100644
--- a/hplip-configure-python.patch
+++ b/hplip-configure-python.patch
@@ -20,12 +20,12 @@ index 9e330e3..e4a254e 100755
 +AC_PATH_PROG(python3_config_path, python3-config, [AC_MSG_ERROR([python3-config not installed], 6)])
 +
 +PYTHON_INCLUDES=`$python3_config_path --includes`
-+if test "X$PYTHON_INCLUDES" == "X" ; then
++if test "X$PYTHON_INCLUDES" = "X" ; then
 +  AC_MSG_ERROR([Cannot get Python includes via python3-config], 6)
 +fi
 +
 +PYTHON_LIBS=`$python3_config_path --libs`
-+if test "X$PYTHON_LIBS" == "X" ; then
++if test "X$PYTHON_LIBS" = "X" ; then
 +  AC_MSG_ERROR([Cannot get Python libs via python3-config], 6)
 +fi
 +
diff --git a/hplip.spec b/hplip.spec
index 078079d..a520d1f 100644
--- a/hplip.spec
+++ b/hplip.spec
@@ -7,7 +7,7 @@
 Summary: HP Linux Imaging and Printing Project
 Name: hplip
 Version: 3.20.6
-Release: 12%{?dist}
+Release: 13%{?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
@@ -768,6 +768,10 @@ rm -f %{buildroot}%{_sysconfdir}/xdg/autostart/hplip-systray.desktop
 %config(noreplace) %{_sysconfdir}/sane.d/dll.d/hpaio
 
 %changelog
+* Wed Sep 30 2020 Zdenek Dohnal <zdohnal@redhat.com> - 3.20.6-13
+- fix bashisms in hplip-configure-python.patch
+- thanks for Daniel Pielmeier from Gentoo for review
+
 * Fri Sep 11 2020 Zdenek Dohnal <zdohnal@redhat.com> - 3.20.6-12
 - move ifdef for removing hplip-gui a little in install phase