diff -r 3ac7eb240b52 dwm.c
--- a/dwm.c	Tue Apr 01 15:45:37 2008 +0100
+++ b/dwm.c	Wed Apr 02 15:25:44 2008 +0200
@@ -1467,21 +1467,16 @@
 
 void
 setmfact(const char *arg) {
-	double delta;
+	double d;
 
 	if(!arg || lt->isfloating)
 		return;
-	delta = strtod(arg, NULL);
-	if(arg[0] == '-' || arg[0] == '+') {
-		if(mfact + delta < 0.1 || mfact + delta > 0.9)
-			return;
-		mfact += delta;
-	}
-	else {
-		if(delta < 0.1 || delta > 0.9)
-			return;
-		mfact = delta;
-	}
+	d = strtod(arg, NULL);
+	if(arg[0] == '-' || arg[0] == '+')
+		d += mfact;
+	if(d < 0.1 || d > 0.9)
+		return;
+	mfact = d;
 	setgeom(geom->symbol);
 }