diff --git a/openscad.spec b/openscad.spec
index 87f1380..244bb94 100644
--- a/openscad.spec
+++ b/openscad.spec
@@ -63,7 +63,7 @@ movies.
 
 %build
 %if 0%{?suse_version}
-qmake PREFIX=%{_prefix}
+qmake PREFIX=%{_prefix} QMAKE_CXXFLAGS="%{optflags}"
 %endif
 %if 0%{?fedora_version}
 qmake-qt4 PREFIX=%{_prefix}