diff --git a/src/tval.c b/src/tval.c
index 4218742..a2577e8 100644
--- a/src/tval.c
+++ b/src/tval.c
@@ -45,7 +45,7 @@ uc_tvcmp(const struct timeval *a, const struct timeval *b)
 }
 
 struct timeval *
-uc_to2tv(struct timeval *dst, unsigned long ms)
+uc_ms2tv(struct timeval *dst, unsigned long long ms)
 {
 	dst->tv_sec = ms / 1000;
 	dst->tv_usec = ms % 1000 * 1000;