--- generic/bltHash.h.in.orig	2013-11-18 17:11:43.000000000 +0100
+++ generic/bltHash.h.in	2013-11-18 17:11:53.000000000 +0100
@@ -88,7 +88,7 @@
  * Acceptable key types for hash tables:
  */
 #define BLT_STRING_KEYS		0
-#define BLT_ONE_WORD_KEYS	((size_t)-1)
+#define BLT_ONE_WORD_KEYS	(-1)
 
 /*
  * Forward declaration of Blt_HashTable.  Needed by some C++ compilers
