diff --git a/src/xmpp/omemo.c b/src/xmpp/omemo.c
index fdb00ee4..7fa6b070 100644
--- a/src/xmpp/omemo.c
+++ b/src/xmpp/omemo.c
@@ -352,6 +352,10 @@ out:
 char*
 omemo_receive_message(xmpp_stanza_t* const stanza, gboolean* trusted)
 {
+    if (!stanza || !trusted || !error) {
+        return NULL;
+    }
+
     char* plaintext = NULL;
     const char* type = xmpp_stanza_get_type(stanza);
     const char* from = xmpp_stanza_get_from(stanza);