diff --git a/po/POTFILES.in b/po/POTFILES.in
index f8c439140..0f8d416a4 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -699,6 +699,7 @@ src/Filters/Rules/Event/_HasNote.py
 src/Filters/Rules/Event/_HasNoteMatchingSubstringOf.py
 src/Filters/Rules/Event/_HasNoteRegexp.py
 src/Filters/Rules/Event/_HasReferenceCountOf.py
+src/Filters/Rules/Event/_HasSource.py
 src/Filters/Rules/Event/_HasType.py
 src/Filters/Rules/Event/_MatchesFilter.py
 src/Filters/Rules/Event/_MatchesPersonFilter.py