diff --git a/lib/libc/isc/ev_timers.c b/lib/libc/isc/ev_timers.c
index 7c25c670ee6..6d08e370fd2 100644
--- a/lib/libc/isc/ev_timers.c
+++ b/lib/libc/isc/ev_timers.c
@@ -117,7 +117,7 @@ evCmpTime(struct timespec a, struct timespec b) {
 }
 
 struct timespec
-evNowTime() {
+evNowTime(void) {
 	struct timeval now;
 #ifdef CLOCK_REALTIME
 	struct timespec tsnow;
@@ -136,7 +136,7 @@ evNowTime() {
 }
 
 struct timespec
-evUTCTime() {
+evUTCTime(void) {
 	struct timeval now;
 #ifdef CLOCK_REALTIME
 	struct timespec tsnow;