diff --git a/bin/hoedown.c b/bin/hoedown.c
index c0e5279..175471a 100644
--- a/bin/hoedown.c
+++ b/bin/hoedown.c
@@ -443,7 +443,7 @@ main(int argc, char **argv)
 	if (data.show_time) {
 		double elapsed;
 
-		if (t1 == -1 || t2 == -1) {
+		if (t1 == ((clock_t) -1) || t2 == ((clock_t) -1)) {
 			fprintf(stderr, "Failed to get the time.\n");
 			return 1;
 		}