diff --git a/sqlparse.y b/sqlparse.y
index 3fde7ef..52e6f37 100644
--- a/sqlparse.y
+++ b/sqlparse.y
@@ -1,4 +1,9 @@
-%define api.prefix {orafce_sql_yy}
+/*
+ * %define api.prefix {orafce_sql_yy} is not compileable on old bison 2.4
+ * so I am using obsolete but still working option.
+ */
+
+%name-prefix "orafce_sql_yy"
 
 %{
 
@@ -46,8 +51,6 @@ static int	scanbuflen;
 
 void orafce_sql_yyerror(List **result, const char *message);
 
-
-#define ORAFCE_SQL_YYLTYPE		int
 #define YYMALLOC	malloc	/* XXX: should use palloc? */
 #define YYFREE		free	/* XXX: should use pfree? */
 
diff --git a/sqlscan.l b/sqlscan.l
index 9c04480..c2a1749 100644
--- a/sqlscan.l
+++ b/sqlscan.l
@@ -48,7 +48,7 @@ static bool extended_string = false;
 
 static YY_BUFFER_STATE scanbufhandle;
 
-#define SET_YYLLOC()  (orafce_sql_yylval.val.lloc = orafce_sql_yylloc = yytext - scanbuf)                                                                                              
+#define SET_YYLLOC()  (orafce_sql_yylval.val.lloc = yytext - scanbuf)                                                                                              
                                                                                                                                                
 /* Handles to the buffer that the lexer uses internally */                                                                                     
 static char *scanbuf;       
@@ -884,7 +884,7 @@ lexer_errposition(void)
 	int		pos;
 
 	/* Convert byte offset to character number */
-	pos = _pg_mbstrlen_with_len(scanbuf, yylloc) + 1;
+	pos = _pg_mbstrlen_with_len(scanbuf, orafce_sql_yylval.val.lloc) + 1;
 	/* And pass it to the ereport mechanism */
 	return errposition(pos);
 }
@@ -902,13 +902,12 @@ lexer_errposition(void)
 void
 orafce_sql_yyerror(List **result, const char *message)
 {
-	const char *loc = scanbuf + yylloc;
+	const char *loc = scanbuf + orafce_sql_yylval.val.lloc;
 
 	if (*loc == YY_END_OF_BUFFER_CHAR)
 	{
 		ereport(ERROR,
 				(errcode(ERRCODE_SYNTAX_ERROR),
-				 /* translator: %s is typically "syntax error" */
 				 errmsg("%s at end of input", _(message)),
 				 lexer_errposition()));
 	}
@@ -916,7 +915,6 @@ orafce_sql_yyerror(List **result, const char *message)
 	{
 		ereport(ERROR,
 				(errcode(ERRCODE_SYNTAX_ERROR),
-				 /* translator: first %s is typically "syntax error" */
 				 errmsg("%s at or near \"%s\"", _(message), loc),
 				 lexer_errposition()));
 	}