diff --git a/Makefile.system b/Makefile.system
index c52dacfec1..18dbb8d83b 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -986,12 +986,8 @@ COMMON_OPT = -O2
 endif
 
 ifndef FCOMMON_OPT
-ifeq ($(OSNAME), WINNT)
-FCOMMON_OPT = -O0 
-else
 FCOMMON_OPT = -O2 -frecursive
 endif
-endif