diff --git a/src/ap/pmksa_cache_auth.c b/src/ap/pmksa_cache_auth.c
index 32d291d1c..891c16b64 100644
--- a/src/ap/pmksa_cache_auth.c
+++ b/src/ap/pmksa_cache_auth.c
@@ -56,7 +56,9 @@ void pmksa_cache_free_entry(struct rsn_pmksa_cache *pmksa,
 	unsigned int hash;
 
 	pmksa->pmksa_count--;
-	pmksa->free_cb(entry, pmksa->ctx);
+
+	if (pmksa->free_cb)
+		pmksa->free_cb(entry, pmksa->ctx);
 
 	/* unlink from hash list */
 	hash = PMKID_HASH(entry->pmkid);