diff --git a/cmd/zed/agents/zfs_mod.c b/cmd/zed/agents/zfs_mod.c
index 22447100b6..c53b431dc8 100644
--- a/cmd/zed/agents/zfs_mod.c
+++ b/cmd/zed/agents/zfs_mod.c
@@ -1212,7 +1212,7 @@ zfs_enum_pools(void *arg)
  * For now, each agent has its own libzfs instance
  */
 int
-zfs_slm_init()
+zfs_slm_init(void)
 {
 	if ((g_zfshdl = libzfs_init()) == NULL)
 		return (-1);
@@ -1238,7 +1238,7 @@ zfs_slm_init()
 }
 
 void
-zfs_slm_fini()
+zfs_slm_fini(void)
 {
 	unavailpool_t *pool;
 	pendingdev_t *device;
diff --git a/cmd/zed/zed_disk_event.c b/cmd/zed/zed_disk_event.c
index e31ec4cfc7..3c8e2fb38c 100644
--- a/cmd/zed/zed_disk_event.c
+++ b/cmd/zed/zed_disk_event.c
@@ -402,7 +402,7 @@ zed_udev_monitor(void *arg)
 }
 
 int
-zed_disk_event_init()
+zed_disk_event_init(void)
 {
 	int fd, fflags;
 
@@ -438,7 +438,7 @@ zed_disk_event_init()
 }
 
 void
-zed_disk_event_fini()
+zed_disk_event_fini(void)
 {
 	/* cancel monitor thread at recvmsg() */
 	(void) pthread_cancel(g_mon_tid);
@@ -456,13 +456,13 @@ zed_disk_event_fini()
 #include "zed_disk_event.h"
 
 int
-zed_disk_event_init()
+zed_disk_event_init(void)
 {
 	return (0);
 }
 
 void
-zed_disk_event_fini()
+zed_disk_event_fini(void)
 {
 }