--- a/generic/bltImage.c
+++ b/generic/bltImage.c
@@ -2535,7 +2535,7 @@
 	color.Red = red >> 8;
 	color.Green = green >> 8;
 	color.Blue = blue >> 8;
-	Mark(cubePtr, color.value, lut);
+	Mark(cubePtr, color.value, (unsigned int (*)[33][33])lut);
     }
     return lut;
 }
@@ -2617,7 +2617,7 @@
     lut = CreateColorLookupTable(statistics, cubes, nColors);
     Blt_Free(statistics);
     Blt_Free(cubes);
-    MapColors(src, dest, lut);
+    MapColors(src, dest, (unsigned int (*)[33][33])lut);
     Blt_Free(lut);
     return TCL_OK;
 }