diff --git a/src/libdraw/mkwsysrules.sh b/src/libdraw/mkwsysrules.sh
index 290cbc91..9d5ca3ba 100644
--- a/src/libdraw/mkwsysrules.sh
+++ b/src/libdraw/mkwsysrules.sh
@@ -23,7 +23,7 @@ fi
 echo 'WSYSTYPE='$WSYSTYPE
 echo 'X11='$X11
 
-if [ WSYSTYPE = x11 ]; then
+if [ $WSYSTYPE = x11 ]; then
 	echo 'CFLAGS=$CFLAGS -I$X11/include'
 	echo 'HFILES=$HFILES $XHFILES'
 fi