diff --git a/.hgignore b/.hgignore
index 8e02212e798d361189954a62ba75b96056736e52..454be00dbffc27a0c6969fb3561556f08d5c1d96 100644
--- a/.hgignore
+++ b/.hgignore
@@ -1,6 +1,10 @@
 syntax: glob
 
+# WinMerge temp files
+*.bak
+# Compiled python bytecode
 *.pyc
+# Emacs temp files
 *~
 .*.swp
 LICENSES