diff --git a/yast2-ruby-bindings.spec b/yast2-ruby-bindings.spec
index ac945e7..550a3fe 100644
--- a/yast2-ruby-bindings.spec
+++ b/yast2-ruby-bindings.spec
@@ -75,8 +75,8 @@ mkdir build
 cd build
 cmake -DCMAKE_INSTALL_PREFIX=%{prefix} \
       -DLIB=%{_lib} \
-      -DCMAKE_C_FLAGS="-Wno-error=format-security %{optflags}" \
-      -DCMAKE_CXX_FLAGS="-Wno-error=format-security %{optflags}" \
+      -DCMAKE_C_FLAGS="%{optflags} -Wno-error=format-security" \
+      -DCMAKE_CXX_FLAGS="%{optflags} -Wno-error=format-security" \
       -DCMAKE_BUILD_TYPE=Release \
       -DCMAKE_SKIP_RPATH=1 \
       ..