--- dwm.c
+++ dwm.c
@@ -114,6 +117,12 @@ typedef struct {
 	void (*arrange)(Monitor *);
 } Layout;
 
+typedef struct {
+	int isgap;
+	int realgap;
+	int gappx;
+} Gap;
+
 struct Monitor {
 	char ltsymbol[16];
 	float mfact;