diff --git a/gcc/gimple-ssa-warn-restrict.cc b/gcc/gimple-ssa-warn-restrict.cc
index 6b6097a3d4c..b7ed15c8902 100644
--- a/gcc/gimple-ssa-warn-restrict.cc
+++ b/gcc/gimple-ssa-warn-restrict.cc
@@ -430,7 +430,7 @@ builtin_memref::set_base_and_offset (tree expr)
       else if (is_gimple_assign (stmt))
 	{
 	  tree_code code = gimple_assign_rhs_code (stmt);
-	  if (code == NOP_EXPR)
+	  if (CONVERT_EXPR_CODE_P (code))
 	    {
 	      tree rhs = gimple_assign_rhs1 (stmt);
 	      if (POINTER_TYPE_P (TREE_TYPE (rhs)))