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-rw-r--r--include/errno.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/errno.h b/include/errno.h
index 9969b1f519..934dae791a 100644
--- a/include/errno.h
+++ b/include/errno.h
@@ -2,7 +2,7 @@
 
 #include <stdlib/errno.h>
 
-#ifdef _ERRNO_H
+#if defined _ERRNO_H && !defined _ISOMAC
 
 # include <tls.h>		/* Defines USE_TLS.  */