diff --git a/cmd/zed/agents/zfs_mod.c b/cmd/zed/agents/zfs_mod.c
index 59d8182c0..17e47873e 100644
--- a/cmd/zed/agents/zfs_mod.c
+++ b/cmd/zed/agents/zfs_mod.c
@@ -1073,7 +1073,7 @@ 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);
@@ -1099,7 +1099,7 @@ 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 52b80d8c4..c4ca54523 100644
--- a/cmd/zed/zed_disk_event.c
+++ b/cmd/zed/zed_disk_event.c
@@ -362,7 +362,7 @@ zed_udev_monitor(void *arg)
 }
 
 int
-zed_disk_event_init()
+zed_disk_event_init(void)
 {
 	int fd, fflags;
 
@@ -398,7 +398,7 @@ 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);
@@ -416,13 +416,13 @@ 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)
 {
 }