diff --git a/src/i18n.py b/src/i18n.py
index b336c9994..734af4482 100644
--- a/src/i18n.py
+++ b/src/i18n.py
@@ -161,7 +161,7 @@ def parse(translationFile):
             if len(data) == 0: # Multiline mode
                 step = IN_MSGSTR
             else:
-                translations |= {(untranslated, data)}
+                translations |= set[((untranslated, data)])
                 step = WAITING_FOR_MSGID
 
 
@@ -172,11 +172,11 @@ def parse(translationFile):
             step = WAITING_FOR_MSGID
             if translated == '':
                 translated = untranslated
-            translations |= {(untranslated, data)}
+            translations |= set[((untranslated, data)])
     if step is IN_MSGSTR:
         if translated == '':
             translated = untranslated
-        translations |= {(untranslated, data)}
+        translations |= set[((untranslated, data)])
     return translations