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-rw-r--r--wcsmbs/uchar.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/wcsmbs/uchar.h b/wcsmbs/uchar.h
index ba36ef9bbc..3056c76365 100644
--- a/wcsmbs/uchar.h
+++ b/wcsmbs/uchar.h
@@ -44,7 +44,7 @@ __END_NAMESPACE_C99
 /* Define the 16-bit and 32-bit character types.  Use the information
    provided by the compiler.  */
 # if !defined __CHAR16_TYPE__ || !defined __CHAR32_TYPE__
-#  if defined __STDC__ && __STDC__ < 201000L
+#  if defined __STDC_VERSION__ && __STDC_VERSION__ < 201000L
 #   error "<uchar.h> requires ISO C11 mode"
 #  else
 #   error "definitions of __CHAR16_TYPE__ and/or __CHAR32_TYPE__ missing"