diff --git a/ext/pdo_oci/oci_statement.c b/ext/pdo_oci/oci_statement.c
index da3542559fdb9..373c903aa5888 100755
--- a/ext/pdo_oci/oci_statement.c
+++ b/ext/pdo_oci/oci_statement.c
@@ -529,7 +529,7 @@ static int oci_stmt_describe(pdo_stmt_t *stmt, int colno TSRMLS_DC) /* {{{ */
 			(param, OCI_DTYPE_PARAM, &colname, &namelen, OCI_ATTR_NAME, S->err));
 
 	col->precision = scale;
-	col->maxlen = data_size;
+	col->maxlen = ( data_size + 1 ) * sizeof(utext);
 	col->namelen = namelen;
 	col->name = estrndup((char *)colname, namelen);
 
diff --git a/ext/pdo_oci/tests/bug54379.phpt b/ext/pdo_oci/tests/bug54379.phpt
new file mode 100644
index 0000000000000..692a48da5259a
--- /dev/null
+++ b/ext/pdo_oci/tests/bug54379.phpt
@@ -0,0 +1,48 @@
+--TEST--
+Bug #54379 (PDO_OCI: UTF-8 output gets truncated)
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo') || !extension_loaded('pdo_oci')) 
+die('skip not loaded');
+require dirname(__FILE__).'/../../pdo/tests/pdo_test.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+putenv('PDO_OCI_TEST_DSN', 'oci:dbname=localhost/xe;charset=AL32UTF8');
+require 'ext/pdo/tests/pdo_test.inc';
+$db = PDOTest::test_factory('ext/pdo_oci/tests/common.phpt');
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+
+try {
+	$db->exec("DROP TABLE test_utf8_trunc");
+} catch (Exception $e) {
+}
+
+
+$db->exec("CREATE TABLE test_utf8_trunc (col1 NVARCHAR2(20))");
+$db->exec("INSERT INTO test_utf8_trunc VALUES('12345678901234567890')");
+$db->exec("INSERT INTO test_utf8_trunc VALUES('あいうえおかきくけこさしすせそたちつてと')");
+
+$stmt = $db->prepare("SELECT * FROM test_utf8_trunc");
+
+$stmt->execute();
+var_dump($stmt->fetchAll(PDO::FETCH_ASSOC));
+
+$db->exec("DROP TABLE test_utf8_trunc");
+
+?>
+--EXPECTF--
+array(2) {
+  [0]=>
+  array(1) {
+    ["COL1"]=>
+    string(20) "12345678901234567890"
+  }
+  [1]=>
+  array(1) {
+    ["COL1"]=>
+    string(40) "あいうえおかきくけこさしすせそたちつてと"
+  }
+}