diff --git a/call.inc.php b/call.inc.php
index 7a450b9f..b805e5bc 100644
--- a/call.inc.php
+++ b/call.inc.php
@@ -5,10 +5,10 @@ $routine = routine($_GET["call"], (isset($_GET["callf"]) ? "FUNCTION" : "PROCEDU
 $in = array();
 $out = array();
 foreach ($routine["fields"] as $i => $field) {
-	if (strcasecmp("out", substr($field["inout"], -3)) == 0) {
+	if (substr($field["inout"], -3) == "OUT") {
 		$out[$i] = "@" . idf_escape($field["field"]) . " AS " . idf_escape($field["field"]);
 	}
-	if (!$match[1] || strcasecmp("in", substr($field["inout"], 0, 2)) == 0) {
+	if (!$field["inout"] || substr($field["inout"], 0, 2) == "IN") {
 		$in[] = $i;
 	}
 }
diff --git a/functions.inc.php b/functions.inc.php
index 53615700..4f2b7b80 100644
--- a/functions.inc.php
+++ b/functions.inc.php
@@ -122,7 +122,7 @@ function normalize_enum($match) {
 
 function routine($name, $type) {
 	global $mysql, $enum_length;
-	$pattern = "\\s*(IN|OUT|INOUT)?\\s*(?:`((?:[^`]+|``)*)`\\s*|\\b(\\S+)\\s+)([a-z]+)(?:\\s*\\(((?:[^'\")]*|$enum_length)+)\\))?\\s*(zerofill\\s+)?(unsigned(?:\\s+zerofill)?)?";
+	$pattern = "\\s*(" . implode("|", $inout) . ")?\\s*(?:`((?:[^`]+|``)*)`\\s*|\\b(\\S+)\\s+)([a-z]+)(?:\\s*\\(((?:[^'\")]*|$enum_length)+)\\))?\\s*(zerofill\\s+)?(unsigned(?:\\s+zerofill)?)?";
 	$create = $mysql->result($mysql->query("SHOW CREATE $type " . idf_escape($name)), 2);
 	preg_match("~\\($pattern(?:\\s*,$pattern)*~is", $create, $match);
 	$params = array();
@@ -134,7 +134,7 @@ function routine($name, $type) {
 			"length" => preg_replace_callback("~$enum_length~s", 'normalize_enum', $match[5]),
 			"unsigned" => strtolower(preg_replace('~\\s+~', ' ', trim("$match[7] $match[6]"))),
 			"null" => true,
-			"inout" => $match[1],
+			"inout" => strtoupper($match[1]),
 		);
 		$params[$i] = $field;
 	}
diff --git a/index.php b/index.php
index 752a3518..2e38fcc1 100644
--- a/index.php
+++ b/index.php
@@ -30,6 +30,7 @@ if (isset($_GET["dump"])) {
 	);
 	$unsigned = array("", "unsigned", "zerofill", "unsigned zerofill");
 	$enum_length = '\'(?:\'\'|[^\'\\\\]+|\\\\.)*\'|"(?:""|[^"\\\\]+|\\\\.)*"';
+	$inout = array("IN", "OUT", "INOUT");
 	
 	if (isset($_GET["table"])) {
 		include "./table.inc.php";