diff --git a/reactos/sdk/include/psdk/gdiplusflat.h b/reactos/sdk/include/psdk/gdiplusflat.h
index 2e22ff4c648..c6f16c4bf4c 100644
--- a/reactos/sdk/include/psdk/gdiplusflat.h
+++ b/reactos/sdk/include/psdk/gdiplusflat.h
@@ -436,6 +436,8 @@ GpStatus WINGDIPAPI GdipSetPropertyItem(GpImage*,GDIPCONST PropertyItem*);
 /* ImageAttributes */
 GpStatus WINGDIPAPI GdipCreateImageAttributes(GpImageAttributes**);
 GpStatus WINGDIPAPI GdipDisposeImageAttributes(GpImageAttributes*);
+GpStatus WINGDIPAPI GdipGetImageAttributesAdjustedPalette(GpImageAttributes*,
+    ColorPalette*,ColorAdjustType);
 GpStatus WINGDIPAPI GdipSetImageAttributesCachedBackground(GpImageAttributes*,
     BOOL);
 GpStatus WINGDIPAPI GdipSetImageAttributesColorKeys(GpImageAttributes*,