diff --git a/addons/fastwq/query/common.py b/addons/fastwq/query/common.py
index 9c5bd48..dfe7a5e 100644
--- a/addons/fastwq/query/common.py
+++ b/addons/fastwq/query/common.py
@@ -289,7 +289,7 @@ def cloze_deletion(text, cloze):
                 e = s + l
                 w = word[:l]
             result = result[:s+offset] + (config.cloze_str % w) + result[e+offset:]
-            offset += 8
+            offset += len(config.cloze_str)-2
     return result
 
 _stemmer = stemmer('english')
diff --git a/addons21/fastwq/query/common.py b/addons21/fastwq/query/common.py
index 870a845..0881898 100644
--- a/addons21/fastwq/query/common.py
+++ b/addons21/fastwq/query/common.py
@@ -290,7 +290,7 @@ def cloze_deletion(text, cloze):
                 e = s + l
                 w = word[:l]
             result = result[:s+offset] + (config.cloze_str % w) + result[e+offset:]
-            offset += 8
+            offset += len(config.cloze_str)-2
     return result
 
 _stemmer = stemmer('english')