diff --git a/ase/macros.h b/ase/macros.h
index 228485c2..ae388035 100644
--- a/ase/macros.h
+++ b/ase/macros.h
@@ -1,5 +1,5 @@
 /*
- * $Id: macros.h,v 1.20 2005-04-02 15:10:48 bacon Exp $
+ * $Id: macros.h,v 1.21 2005-04-02 15:36:02 bacon Exp $
  */
 
 #ifndef _XP_MACROS_H_
@@ -40,7 +40,7 @@
 
 #define XP_REPEAT(n,blk) \
 	do { \
-		xp_size_t __xp_repeat_x1 = (n); \
+		xp_size_t __xp_repeat_x1 = (xp_size_t)(n); \
 		xp_size_t __xp_repeat_x2 = __xp_repeat_x1 >> 4; \
 		__xp_repeat_x1 &= 15; \
 		while (__xp_repeat_x1-- > 0) { blk; } \