diff --git a/polymer/eduke32/build/src/engine.c b/polymer/eduke32/build/src/engine.c
index d49b443b5..47ce04554 100644
--- a/polymer/eduke32/build/src/engine.c
+++ b/polymer/eduke32/build/src/engine.c
@@ -12162,7 +12162,10 @@ void hash_free(hashtable_t *t)
             cur = cur->next;
 //          initprintf("Free %4d '%s'\n",tmp->key,(tmp->string)?tmp->string:".");
             if (tmp->string)
+            {
                 Bfree(tmp->string);
+                tmp->string = NULL;
+            }
             Bfree(tmp);
             num++;
         }