diff --git a/lib/defines.h b/lib/defines.h
index b644036c..049c0506 100644
--- a/lib/defines.h
+++ b/lib/defines.h
@@ -144,7 +144,7 @@
 
 /* Solaris defines this in shadow.h */
 #ifndef DAY
-#define DAY (24L*3600L)
+#define DAY  ((time_t) 24 * 3600)
 #endif
 
 #define WEEK (7*DAY)