diff --git a/ext/mdbx_ext/database.c b/ext/mdbx_ext/database.c
index e400341..66ae796 100644
--- a/ext/mdbx_ext/database.c
+++ b/ext/mdbx_ext/database.c
@@ -101,16 +101,6 @@ rmdbx_closed_p( VALUE self )
 }
 
 
-/*
- * Check if a given +flag+ is enabled for flag +val+.
- */
-int
-rmdbx_flag_enabled( val, flag )
-{
-	return ( val & flag ) == flag;
-}
-
-
 /*
  * Given a ruby string +key+ and a pointer to an MDBX_val, prepare the
  * key for usage within mdbx.  All keys are explicitly converted to