diff --git a/dynlibmod/dynlibmod.c b/dynlibmod/dynlibmod.c
index f9751d8c6..10ae143a4 100644
--- a/dynlibmod/dynlibmod.c
+++ b/dynlibmod/dynlibmod.c
@@ -242,6 +242,8 @@ int
 inplace_cb_register_wrapped(void* cb, enum inplace_cb_list_type type, void* cbarg,
     struct module_env* env, int id) {
     struct cb_pair* cb_pair = malloc(sizeof(struct cb_pair));
+    if(cb_pair == NULL)
+        return 0;
     cb_pair->cb = cb;
     cb_pair->cb_arg = cbarg;
     if(type >= inplace_cb_reply && type <= inplace_cb_reply_servfail) {
@@ -253,6 +255,7 @@ inplace_cb_register_wrapped(void* cb, enum inplace_cb_list_type type, void* cbar
     } else if(type == inplace_cb_edns_back_parsed) {
         return inplace_cb_register(&dynlib_inplace_cb_edns_back_parsed, type, (void*) cb_pair, env, id);
     } else {
+        free(cb_pair);
         return 0;
     }
 }