diff --git a/ShareX.ScreenCaptureLib/Forms/RegionCaptureForm.cs b/ShareX.ScreenCaptureLib/Forms/RegionCaptureForm.cs
index 3476036b3..b85f544b6 100644
--- a/ShareX.ScreenCaptureLib/Forms/RegionCaptureForm.cs
+++ b/ShareX.ScreenCaptureLib/Forms/RegionCaptureForm.cs
@@ -179,11 +179,11 @@ private void onMouseWheel(object sender, MouseEventArgs e)
             }
             if (e.Delta > 0)
             {
-                ZoomFactor += 0.1F;
+                ZoomFactor *= 1.1F;
             }
             else if (ZoomFactor > 0.2)
             {
-                ZoomFactor -= 0.1F;
+                ZoomFactor /= 1.1F;
             }
             UpdateTitle();
         }