diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index e5934f90f..4d2f65ba3 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+2001-03-05  Jeff Johnston  <jjohnstn@redhat.com>
+
+        * libc/time/mktime.c: Add L suffix to _SEC_IN_xxxx constants.
+
 Sat Mar  3 00:34:14 2001  Christopher Faylor <cgf@cygnus.com>
 
 	* libc/include/sys/stat.h: Use special defines for executable stat bits
diff --git a/newlib/libc/time/mktime.c b/newlib/libc/time/mktime.c
index 431eca568..80478dae9 100644
--- a/newlib/libc/time/mktime.c
+++ b/newlib/libc/time/mktime.c
@@ -48,9 +48,9 @@ ANSI C requires <<mktime>>.
 #include <stdlib.h>
 #include <time.h>
 
-#define _SEC_IN_MINUTE 60
-#define _SEC_IN_HOUR 3600
-#define _SEC_IN_DAY 86400
+#define _SEC_IN_MINUTE 60L
+#define _SEC_IN_HOUR 3600L
+#define _SEC_IN_DAY 86400L
 
 static _CONST int DAYS_IN_MONTH[12] =
 {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};