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-rw-r--r--test/Modules/compiler_builtins.m2
1 files changed, 1 insertions, 1 deletions
diff --git a/test/Modules/compiler_builtins.m b/test/Modules/compiler_builtins.m
index 63d9f954e7..5ec2e978b3 100644
--- a/test/Modules/compiler_builtins.m
+++ b/test/Modules/compiler_builtins.m
@@ -1,5 +1,5 @@
// RUN: rm -rf %t
-// RUN: %clang -fsyntax-only -fmodules -fmodule-cache-path %t %s -Xclang -verify
+// RUN: %clang -fsyntax-only -fmodules -fmodule-cache-path %t -D__need_wint_t %s -Xclang -verify
@import _Builtin_stdlib.float_constants;