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-rw-r--r--socket/sys/un.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/socket/sys/un.h b/socket/sys/un.h
index 02fc775acb..331f49650f 100644
--- a/socket/sys/un.h
+++ b/socket/sys/un.h
@@ -37,7 +37,7 @@ struct sockaddr_un
/* Evaluate to actual length of the `sockaddr_un' structure. */
-#define SUN_LEN(ptr) (((struct sockaddr_un *) 0)->sun_path \
+#define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \
+ strlen ((ptr)->sun_path))
__END_DECLS