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-rw-r--r--include/sys/file.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/sys/file.h b/include/sys/file.h
index e73a4d1c94..d0cd1f9e15 100644
--- a/include/sys/file.h
+++ b/include/sys/file.h
@@ -1,6 +1,10 @@
 #ifndef _SYS_FILE_H
 #include <misc/sys/file.h>
 
+# ifndef _ISOMAC
+
 /* Now define the internal interfaces.  */
 extern int __flock (int __fd, int __operation);
+
+# endif /* !_ISOMAC */
 #endif