diff --git a/lib/libshare/libshare.c b/lib/libshare/libshare.c
index ea59dcdbc6..89a4fe9aa9 100644
--- a/lib/libshare/libshare.c
+++ b/lib/libshare/libshare.c
@@ -215,7 +215,7 @@ update_sharetab(sa_handle_impl_t impl_handle)
 	fsync(temp_fd);
 	fclose(temp_fp);
 
-	rename(tempfile, "/etc/dfs/sharetab");
+	(void) rename(tempfile, "/etc/dfs/sharetab");
 }
 
 typedef struct update_cookie_s {
diff --git a/lib/libshare/nfs.c b/lib/libshare/nfs.c
index abcc1025b1..58b4c88804 100644
--- a/lib/libshare/nfs.c
+++ b/lib/libshare/nfs.c
@@ -675,7 +675,7 @@ nfs_check_exportfs(void)
 
 	unlink(nfs_exportfs_tempfile);
 
-	fcntl(nfs_exportfs_temp_fd, F_SETFD, FD_CLOEXEC);
+	(void) fcntl(nfs_exportfs_temp_fd, F_SETFD, FD_CLOEXEC);
 
 	pid = fork();
 
diff --git a/lib/libzpool/kernel.c b/lib/libzpool/kernel.c
index 5796262204..f4bda8a393 100644
--- a/lib/libzpool/kernel.c
+++ b/lib/libzpool/kernel.c
@@ -1045,7 +1045,7 @@ kobj_get_filesize(struct _buf *file, uint64_t *size)
 void
 delay(clock_t ticks)
 {
-	poll(0, 0, ticks * (1000 / hz));
+	(void) poll(0, 0, ticks * (1000 / hz));
 }
 
 /*