diff --git a/Modules/makesetup b/Modules/makesetup
index e8229e6..3da5323 100755
--- a/Modules/makesetup
+++ b/Modules/makesetup
@@ -140,7 +140,7 @@
 			srcs)	srcs="$srcs $arg"; skip=; continue;;
 			esac
 			case $arg in
-			-[IDUC]*)	cpps="$cpps $arg";;
+			-[IDUCf]*)	cpps="$cpps $arg";;
 			-Xlinker)	libs="$libs $arg"; skip=libs;;
 			-rpath)		libs="$libs $arg"; skip=libs;;
 			-[A-Zl]*)	libs="$libs $arg";;