diff --git a/widelands.spec b/widelands.spec
index 988f45a..a3c53f7 100644
--- a/widelands.spec
+++ b/widelands.spec
@@ -40,7 +40,7 @@ perhaps will have a thought, what Widelands is all about.
 sed -i 's#flagi#%{optflags}##' build/scons-tools/scons_configure.py
 
 %build
-export extra_compile_flags=$RPM_OPT_FLAGS"
+export extra_compile_flags="$RPM_OPT_FLAGS"
 scons build=release datadir=%{_datadir}/%{name} bindir=%{_bindir} localedir=%{_datadir}/%{name}/locale build_id=%{build_id}
 
 # ./build-widelands.sh