diff --git a/.hgignore b/.hgignore
new file mode 100644
index 00000000000..3a66c74f0d6
--- /dev/null
+++ b/.hgignore
@@ -0,0 +1,24 @@
+syntax:glob
+*.[568ao]
+*.ao
+*.so
+[568a].out
+_obj
+_test
+src/cmd/6a/6a
+y.tab.[ch]
+src/cmd/6l/enam.c
+src/cmd/gc/builtin.c
+src/cmd/gc/mkbuiltin1
+src/cmd/gc/opnames.h
+src/pkg/exp/ogle/ogle
+src/pkg/runtime/cgo2c
+src/pkg/runtime/amd64/asm.h
+test/pass.out
+test/run.out
+test/times.out
+*.pyc
+
+syntax:regexp
+^pkg/
+^src/cmd/(.*)/6?\1$