diff --git a/.gitattributes b/.gitattributes
index 8c6d9a08..8e52e1c6 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,6 +1,7 @@
 *.zzzgo linguist-language=Go
 doc.go linguist-documentation
 *.md linguist-documentation
+*.pb.go linguist-generated
 basegroup.go linguist-generated
 line.go linguist-generated
 seed.go linguist-generated
diff --git a/Makefile b/Makefile
index b7ae9562..694b8445 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@ all:	$(ZZZGENERATED) $(PB) .gitattributes
 	echo '*.zzzgo linguist-language=Go' > $@
 	echo 'doc.go linguist-documentation' >> $@
 	echo '*.md linguist-documentation' >> $@
+	echo '*.pb.go linguist-generated' >> $@
 	for i in $(ZZZGENERATED); do echo "$$i linguist-generated" >> $@; done
 
 test:	$(ZZZGENERATED) testadjuster