diff --git a/libkwineffects/kwineffects.h b/libkwineffects/kwineffects.h
index de9efb9a63..eb09d51f4b 100644
--- a/libkwineffects/kwineffects.h
+++ b/libkwineffects/kwineffects.h
@@ -1642,7 +1642,7 @@ public:
      **/
     QRegion paint;
     /**
-     * The clip region will be substracted from paint region of following windows.
+     * The clip region will be subtracted from paint region of following windows.
      * I.e. window will definitely cover it's clip region
      **/
     QRegion clip;