diff --git a/src/layout/arrange.h b/src/layout/arrange.h
index 63058ad..e57c821 100644
--- a/src/layout/arrange.h
+++ b/src/layout/arrange.h
@@ -12,7 +12,7 @@ void set_size_per(Monitor *m, Client *c) {
 	}
 
 	if (!found) {
-		c->master_mfact_per = 0.5f;
+		c->master_mfact_per = default_mfact;
 		c->master_inner_per = 1.0f;
 		c->stack_innder_per = 1.0f;
 	}