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-rw-r--r--include/getopt.h5
1 files changed, 2 insertions, 3 deletions
diff --git a/include/getopt.h b/include/getopt.h
index 6f2693d21b..c094972c97 100644
--- a/include/getopt.h
+++ b/include/getopt.h
@@ -3,11 +3,10 @@
 #include <features.h>		/* Get __GNU_LIBRARY__ defined now.  */
 #include <posix/getopt.h>
 
-# ifdef _GETOPT_H
+# if defined _GETOPT_H && !defined _ISOMAC
 
 /* Now define the internal interfaces.  */
 extern void __getopt_clean_environment (char **__env);
 
-# endif
-
+# endif /* _GETOPT_H && !_ISOMAC */
 #endif