diff --git a/anki/importing/__init__.py b/anki/importing/__init__.py
index 83ce7495f..4c86b1b23 100644
--- a/anki/importing/__init__.py
+++ b/anki/importing/__init__.py
@@ -122,9 +122,9 @@ class Importer(object):
             if cm.active: active += 1
         if active > 1 and not self.multipleCardsAllowed:
             raise ImportFormatError(type="tooManyCards",
-                info=_("""
-The current importer only supports a single active card template. Please disable
-all but one card template."""))
+                info=_("""\
+The current importer only supports a single active card template. Please disable\
+ all but one card template."""))
         # strip invalid cards
         cards = self.stripInvalid(cards)
         cards = self.stripOrTagDupes(cards)