diff --git a/muon.go b/muon.go
index 3ed4c47..e5855a3 100644
--- a/muon.go
+++ b/muon.go
@@ -329,7 +329,9 @@ func (w *Window) addFunction(name string) {
 
 func resizeCallback(ov ULOverlay) func(userData unsafe.Pointer, width uint32, height uint32) {
 	return func(userData unsafe.Pointer, width uint32, height uint32) {
-		UlOverlayResize(ov, width, height)
+		if height > 0 {
+			UlOverlayResize(ov, width, height)
+		}
 	}
 }