--- a/timertest.c
+++ b/timertest.c
@@ -38,6 +38,9 @@
 #include <dahdi/user.h>
 #include "dahdi_tools_version.h"
 
+#define TIME_T_FMT "lld"
+#define TIME_T_CAST(x) ((long long)(x))
+
 int main(int argc, char *argv[])
 {
 	int fd;
@@ -72,7 +75,7 @@ int main(int argc, char *argv[])
 			exit(1);
 		}
 		gettimeofday(&now, NULL);
-		printf("Timer Expired (%ld ms)!\n", (now.tv_sec - orig.tv_sec) * 1000 + (now.tv_usec - orig.tv_usec) / 1000);
+		printf("Timer Expired (%" TIME_T_FMT " ms)!\n", TIME_T_CAST((now.tv_sec - orig.tv_sec) * 1000 + (now.tv_usec - orig.tv_usec) / 1000));
 	}
 	exit(0);
 }