diff --git a/gcc/gimplify.c b/gcc/gimplify.c
index cfe6696..2cd48de 100644
--- a/gcc/gimplify.c
+++ b/gcc/gimplify.c
@@ -1050,6 +1050,7 @@ voidify_wrapper_expr (tree wrapper, tree temp)
 	    case CLEANUP_POINT_EXPR:
 	    case TRY_FINALLY_EXPR:
 	    case TRY_CATCH_EXPR:
+	    case MUST_NOT_THROW_EXPR:
 	      TREE_SIDE_EFFECTS (*p) = 1;
 	      TREE_TYPE (*p) = void_type_node;
 	      p = &TREE_OPERAND (*p, 0);