diff --git a/platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorImpl.java b/platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorImpl.java
index 3aa700fda5d4..cb885ea6cb35 100644
--- a/platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorImpl.java
+++ b/platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorImpl.java
@@ -5207,7 +5207,7 @@ public final class EditorImpl extends UserDataHolderBase implements EditorEx, Hi
     protected void processMouseWheelEvent(MouseWheelEvent e) {
       if (mySettings.isWheelFontChangeEnabled()) {
         if (isChangeFontSize(e)) {
-          setFontSize(myScheme.getEditorFontSize() + e.getWheelRotation());
+          setFontSize(myScheme.getEditorFontSize() - e.getWheelRotation());
           return;
         }
       }