diff --git a/README.PARAMETER_PARSING_API b/README.PARAMETER_PARSING_API
index c344817b374..7f3da76f808 100644
--- a/README.PARAMETER_PARSING_API
+++ b/README.PARAMETER_PARSING_API
@@ -63,10 +63,10 @@ Type specifiers
  o  - object of any type (zval*)
  O  - object of specific type given by class entry (zval*, zend_class_entry)
  p  - valid path (string without null bytes in the middle) and its length (char*, size_t)
- P  - valid path (string without null bytes in the middle) as zend_string (zend_string)
+ P  - valid path (string without null bytes in the middle) as zend_string (zend_string*)
  r  - resource (zval*)
  s  - string (with possible null bytes) and its length (char*, size_t)
- S  - string (with possible null bytes) as zend_string (zend_string)
+ S  - string (with possible null bytes) as zend_string (zend_string*)
  z  - the actual zval (zval*)
  *  - variable arguments list (0 or more)
  +  - variable arguments list (1 or more)
diff --git a/ext/interbase/interbase.c b/ext/interbase/interbase.c
index d1174cf576f..3f9ac58ce18 100644
--- a/ext/interbase/interbase.c
+++ b/ext/interbase/interbase.c
@@ -884,7 +884,8 @@ int _php_ibase_attach_db(char **args, int *len, zend_long *largs, isc_db_handle
 static void _php_ibase_connect(INTERNAL_FUNCTION_PARAMETERS, int persistent) /* {{{ */
 {
 	char *c, hash[16], *args[] = { NULL, NULL, NULL, NULL, NULL };
-	int i, len[] = { 0, 0, 0, 0, 0 };
+	int i;
+	size_t len[] = { 0, 0, 0, 0, 0 };
 	zend_long largs[] = { 0, 0, 0 };
 	PHP_MD5_CTX hash_context;
 	zend_resource new_index_ptr, *le;