diff --git a/uppsrc/CtrlCore/CtrlMouse.cpp b/uppsrc/CtrlCore/CtrlMouse.cpp
index ee506678b..08ba75fc2 100644
--- a/uppsrc/CtrlCore/CtrlMouse.cpp
+++ b/uppsrc/CtrlCore/CtrlMouse.cpp
@@ -513,6 +513,8 @@ bool sDblTime(int time)
 
 Image Ctrl::DispatchMouse(int e, Point p, int zd) {
 	GuiLock __;
+	if(e == MOUSEWHEEL && !zd) // ignore non-scroll wheel events
+		return Null;
 	if(e == MOUSEMOVE && repeatTopCtrl == this) {
 		if(sDistMin(leftmousepos, p) > GUI_DragDistance() && GetMouseLeft()) {
 			DispatchMouseEvent(LEFTDRAG, leftmousepos, 0);