diff --git a/hdparm.spec b/hdparm.spec
index 3821780..386f3de 100644
--- a/hdparm.spec
+++ b/hdparm.spec
@@ -20,7 +20,7 @@ performance and to spin down hard drives for power conservation.
 %patch0 -p1 
 
 %build
-perl -pi -e "s,-O2,$RPM_OPT_FLAGS,g" Makefile
+perl -pi -e "s/-O2/$RPM_OPT_FLAGS/g" Makefile
 make
 
 %install