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-rw-r--r--lib/Headers/stdint.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Headers/stdint.h b/lib/Headers/stdint.h
index d51966713d..12546d8921 100644
--- a/lib/Headers/stdint.h
+++ b/lib/Headers/stdint.h
@@ -122,7 +122,7 @@ typedef __UINTMAX_TYPE__ uintmax_t;
#define UINT_FAST32_MAX UINT32_MAX
/* If we do not have 64-bit support, don't define the 64-bit size macros. */
-#ifndef __INT64_TYPE__
+#ifdef __INT64_TYPE__
#define INT64_MAX 9223372036854775807LL
#define INT64_MIN (-9223372036854775807LL-1)
#define UINT64_MAX 18446744073709551615ULL