diff --git a/renderdoc/serialise/serialiser.h b/renderdoc/serialise/serialiser.h
index e0057ab63..4c4f870d1 100644
--- a/renderdoc/serialise/serialiser.h
+++ b/renderdoc/serialise/serialiser.h
@@ -523,7 +523,7 @@ public:
     }
     else
     {
-      el.assign(NULL, sz);
+      el.resize((size_t)sz);
       for(int32_t i = 0; i < sz; i++)
         Serialise("", el[i]);
     }