diff --git a/client/src/proxguiqt.cpp b/client/src/proxguiqt.cpp
index b75fa462e..2d988fc9e 100644
--- a/client/src/proxguiqt.cpp
+++ b/client/src/proxguiqt.cpp
@@ -687,7 +687,7 @@ void Plot::wheelEvent(QWheelEvent *event) {
     const float zoom_offset = 0.1;
     if (event->modifiers() & Qt::ShiftModifier) {
 // event->position doesn't exist in QT5.12.8, both exist in 5.14.2 and event->x doesn't exist in 5.15.0
-#if QT_VERSION >= 0x051400
+#if QT_VERSION >= 0x050d00
         int x = event->position().x();
 #else
         int x = event->x();
@@ -696,13 +696,13 @@ void Plot::wheelEvent(QWheelEvent *event) {
         x = (int)(x / GraphPixelsPerPoint);
         x += GraphStart;
 // event->angleDelta doesn't exist in QT4, both exist in 5.12.8 and 5.14.2 and event->delta doesn't exist in 5.15.0
-#if QT_VERSION >= 0x051400
+#if QT_VERSION >= 0x050d00
         Zoom(1.0-(float)event->angleDelta().y()/(120/zoom_offset), x);
 #else
         Zoom(1.0-(float)event->delta()/(120/zoom_offset), x);
 #endif
     } else {
-#if QT_VERSION >= 0x051400
+#if QT_VERSION >= 0x050d00
         Move(PageWidth*(-(float)event->angleDelta().y()/(120/move_offset)));
 #else
         Move(PageWidth*(-(float)event->delta()/(120/move_offset)));