diff --git a/po/POTFILES.in b/po/POTFILES.in
index ad42318aa0..ddfa7d02cb 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -1,7 +1,7 @@
 ext/dash/gstdashdemux.c
 ext/gl/gstgltestsrc.c
 ext/gsettings/org.freedesktop.gstreamer.default-elements.gschema.xml.in
-ext/opencv/gsttemplatematch.c
+ext/opencv/gsttemplatematch.cpp
 ext/resindvd/resindvdsrc.c
 ext/smoothstreaming/gstmssdemux.c
 ext/sndfile/gstsfdec.c