diff --git a/src/util/ssa_expr.h b/src/util/ssa_expr.h
index 3a0e3b151d6..e04325b4caf 100644
--- a/src/util/ssa_expr.h
+++ b/src/util/ssa_expr.h
@@ -65,7 +65,7 @@ class ssa_exprt:public symbol_exprt
 
   const irep_idt get_l1_object_identifier() const
   {
-    #if 1
+    #if 0
     return get_l1_object().get_identifier();
     #else
     // the above is the clean version, this is the fast one, using