diff --git a/ext/standard/basic_functions.c b/ext/standard/basic_functions.c
index f0f8e0037c1..cd24c348232 100644
--- a/ext/standard/basic_functions.c
+++ b/ext/standard/basic_functions.c
@@ -4173,19 +4173,20 @@ PHP_MINFO_FUNCTION(basic)
 }
 
 
-/* {{{ proto mixed constant(string const_name)
-   Given the name of a constant this function will return the constants associated value */
+/* {{{ proto mixed constant(string const_name) U
+   Given the name of a constant this function will return the constant's associated value */
 PHP_FUNCTION(constant)
 {
 	zstr const_name;
-	int const_name_len, const_type;
+	int const_name_len;
+	zend_uchar const_type;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "T", &const_name, &const_name_len, &const_type) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "t", &const_name, &const_name_len, &const_type) == FAILURE) {
 		return;
 	}
 
 	if (!zend_u_get_constant(const_type, const_name, const_name_len, return_value TSRMLS_CC)) {
-		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Couldn't find constant %v", const_name);
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Couldn't find constant %R", const_type, const_name);
 		RETURN_NULL();
 	}
 }