diff --git a/gtests/net/packetdrill/.gitignore b/gtests/net/packetdrill/.gitignore
index 6db66d1684fcb5e99121b3da41105d930271a5c2..274c6dcfb14747a3df821cf18b16e321b092366c 100644
--- a/gtests/net/packetdrill/.gitignore
+++ b/gtests/net/packetdrill/.gitignore
@@ -10,3 +10,9 @@ parser.output
 
 # lexer files generated by flex:
 lexer.c
+
+# this is a symbolic link made by ./configure:
+Makefile
+
+*.o
+*~