diff --git a/sassc.spec b/sassc.spec
index 6db338f..7c80de4 100644
--- a/sassc.spec
+++ b/sassc.spec
@@ -39,9 +39,9 @@ mv sass-spec-%{testspec_version} sass-spec
 
 %build
 %make_build build-shared \
-    LDFLAGS=$RPM_OPT_FLAGS \
-    CFLAGS=$RPM_OPT_FLAGS \
-    CXXFLAGS=$RPM_OPT_FLAGS
+    LDFLAGS="$RPM_OPT_FLAGS" \
+    CFLAGS="$RPM_OPT_FLAGS" \
+    CXXFLAGS="$RPM_OPT_FLAGS"
 
 
 %install