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-rw-r--r--libio/libio.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/libio/libio.h b/libio/libio.h
index 7b2f70cdab..b257f13915 100644
--- a/libio/libio.h
+++ b/libio/libio.h
@@ -72,7 +72,9 @@
 #endif /*!_PARAMS*/
 
 #ifndef __STDC__
-# define const
+# ifndef const
+#  define const
+# endif
 #endif
 #define _IO_UNIFIED_JUMPTABLES 1
 #ifndef _G_HAVE_PRINTF_FP