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-rw-r--r--include/stdio.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/stdio.h b/include/stdio.h
index b0190d25eb4f..ee3ab3bfb986 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -48,10 +48,13 @@ typedef __size_t size_t;
#define _SIZE_T_DECLARED
#endif
+#if __EXT1_VISIBLE
+/* ISO/IEC 9899:2011 K.3.3.2 */
#ifndef _RSIZE_T_DEFINED
#define _RSIZE_T_DEFINED
typedef size_t rsize_t;
#endif
+#endif /* __EXT1_VISIBLE */
#if __POSIX_VISIBLE >= 200809
#ifndef _OFF_T_DECLARED