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-rw-r--r--ext/dbm/dbm.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/dbm/dbm.c b/ext/dbm/dbm.c
index 93c1f80c96f..11fd5fbb0da 100644
--- a/ext/dbm/dbm.c
+++ b/ext/dbm/dbm.c
@@ -165,6 +165,7 @@ fdbm_initialize(int argc, VALUE *argv, VALUE obj)
if (dbm) {
/*
* History of dbm_pagfno() and dbm_dirfno() in ndbm and its compatibles.
+ * (dbm_pagfno() and dbm_dirfno() is not standardized.)
*
* 1986: 4.3BSD provides ndbm.
* It provides dbm_pagfno() and dbm_dirfno() as macros.