diff --git a/dlls/gdiplus/image.c b/dlls/gdiplus/image.c
index 78801fdbf1b..4fd1a4ff0a0 100644
--- a/dlls/gdiplus/image.c
+++ b/dlls/gdiplus/image.c
@@ -554,6 +554,8 @@ GpStatus WINGDIPAPI GdipBitmapUnlockBits(GpBitmap* bitmap,
     BOOL bm_is_selected;
     BITMAPINFO *pbmi;
 
+    TRACE("(%p,%p)\n", bitmap, lockeddata);
+
     if(!bitmap || !lockeddata)
         return InvalidParameter;