diff --git a/os/ospoll.c b/os/ospoll.c
index bca039a10..31dfd0527 100644
--- a/os/ospoll.c
+++ b/os/ospoll.c
@@ -207,6 +207,8 @@ ospoll_create(void)
 {
 #if POLLSET
     struct ospoll *ospoll = calloc(1, sizeof (struct ospoll));
+    if (!ospoll)
+        return NULL;
 
     ospoll->ps = pollset_create(-1);
     if (ospoll->ps < 0) {
@@ -217,6 +219,8 @@ ospoll_create(void)
 #endif
 #if PORT
     struct ospoll *ospoll = calloc(1, sizeof (struct ospoll));
+    if (!ospoll)
+        return NULL;
 
     ospoll->epoll_fd = port_create();
     if (ospoll->epoll_fd < 0) {
@@ -228,6 +232,8 @@ ospoll_create(void)
 #endif
 #if EPOLL
     struct ospoll       *ospoll = calloc(1, sizeof (struct ospoll));
+    if (!ospoll)
+        return NULL;
 
     ospoll->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
     if (ospoll->epoll_fd < 0) {