diff --git a/.hgignore b/.hgignore
new file mode 100644
index 0000000..6102268
--- /dev/null
+++ b/.hgignore
@@ -0,0 +1,10 @@
+syntax: glob
+*.dylib
+*.o
+*.so
+*~
+build
+ObjOpenSSL.xcodeproj/*.mode1v3
+ObjOpenSSL.xcodeproj/*.pbxuser
+ObjOpenSSL.xcodeproj/project.xcworkspace
+ObjOpenSSL.xcodeproj/xcuserdata