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-rw-r--r--lib/Headers/stdint.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Headers/stdint.h b/lib/Headers/stdint.h
index 8841ed06e5..3eb72bb57b 100644
--- a/lib/Headers/stdint.h
+++ b/lib/Headers/stdint.h
@@ -216,8 +216,8 @@ typedef __UINTMAX_TYPE__ uintmax_t;
#define INT32_C(v) (v)
#define UINT32_C(v) (v##U)
-/* If we do not have 64-bit support, don't define the 64-bit size macros. */
-#ifndef __INT64_TYPE__
+/* Only define the 64-bit size macros if we have 64-bit support. */
+#ifdef __INT64_TYPE__
#define INT64_C(v) (v##LL)
#define UINT64_C(v) (v##ULL)
#endif