diff --git a/reactos/subsystems/win32/win32k/eng/bitblt.c b/reactos/subsystems/win32/win32k/eng/bitblt.c
index be39c2059fb..3c65aaa6862 100644
--- a/reactos/subsystems/win32/win32k/eng/bitblt.c
+++ b/reactos/subsystems/win32/win32k/eng/bitblt.c
@@ -67,8 +67,8 @@ BltMask(SURFOBJ* psoDest,
             psoPattern = &psurfPattern->SurfObj;
             PatternWidth = psoPattern->sizlBitmap.cx;
             PatternHeight = psoPattern->sizlBitmap.cy;
+            fnPattern_GetPixel = DibFunctionsForBitmapFormat[psoPattern->iBitmapFormat].DIB_GetPixel;
         }
-        fnPattern_GetPixel = DibFunctionsForBitmapFormat[psoPattern->iBitmapFormat].DIB_GetPixel;
     }
     else
         psurfPattern = NULL;