diff --git a/src/mred/mred.cxx b/src/mred/mred.cxx
index 392bd9ba85..a91acc748b 100644
--- a/src/mred/mred.cxx
+++ b/src/mred/mred.cxx
@@ -3165,6 +3165,7 @@ static void MrEdOutOfMemory(void)
 void *wxOutOfMemory()
 {
   scheme_out_of_memory_abort();
+  return NULL;
 }
 
 extern "C" {