diff --git a/modules/beast_core/containers/beast_OwnedArray.h b/modules/beast_core/containers/beast_OwnedArray.h
index 16d2c848b..773064f6f 100644
--- a/modules/beast_core/containers/beast_OwnedArray.h
+++ b/modules/beast_core/containers/beast_OwnedArray.h
@@ -433,7 +433,7 @@ public:
             numElementsToAdd = arrayToAddFrom.size() - startIndex;
 
         data.ensureAllocatedSize (numUsed + numElementsToAdd);
-        bassert (data.elements != nullptr);
+        bassert (numElementsToAdd <= 0 || data.elements != nullptr);
 
         while (--numElementsToAdd >= 0)
         {