diff --git a/data/tools/wesnoth/wmliterator.py b/data/tools/wesnoth/wmliterator.py
index 6147a28705e..c567b5c479f 100644
--- a/data/tools/wesnoth/wmliterator.py
+++ b/data/tools/wesnoth/wmliterator.py
@@ -23,7 +23,7 @@ Limitations:
 import sys, re, copy
 keyPattern = re.compile('(\w+)(,\s?\w+)*\s*=')
 keySplit = re.compile(r'[=,\s]')
-tagPattern = re.compile(r'(^|(?<![\w\|\}]))(\[.*?\])')
+tagPattern = re.compile(r'(^|(?<![\w\|\}]))(\[/?\+?[a-z].*?\])')
 macroOpenPattern = re.compile(r'(\{[^\s\}\{]*)')
 macroClosePattern = re.compile(r'\}')
 closeMacroType = 'end of macro'