Index: code/renderer/tr_model.c
===================================================================
--- code/renderer/tr_model.c	(revision 2061)
+++ code/renderer/tr_model.c	(working copy)
@@ -1160,7 +1160,7 @@
 
 			// uncompressed model...
 			//
-			frameSize = (long)( &((mdrFrame_t *)0)->bones[ mod->numBones ] );
+			frameSize = (size_t)( &((mdrFrame_t *)0)->bones[ mod->numBones ] );
 			frame = (mdrFrame_t *)((byte *)mod + mod->ofsFrames + framenum * frameSize );
 
 			for (j = 0; j < 3; j++)