1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index 30f35dc7de..a1c03f290a 100644
--- a/io.c
+++ b/io.c
@@ -3398,6 +3398,6 @@ Init_IO()
     rb_file_const("BINARY", INT2FIX(O_BINARY));
 #endif
 #ifdef O_SYNC
-    rb_file_const("BINARY", INT2FIX(O_SYNC));
+    rb_file_const("SYNC", INT2FIX(O_SYNC));
 #endif
 }