diff --git a/runtime/internal/genobj.d b/runtime/internal/genobj.d
index 600feb50..0c9c10e7 100644
--- a/runtime/internal/genobj.d
+++ b/runtime/internal/genobj.d
@@ -907,6 +907,7 @@ class Exception : Object
 {
     struct FrameInfo{
         long line;
+        ptrdiff_t iframe;
         ptrdiff_t offset;
         size_t address;
         char[] file;