diff --git a/.gitignore b/.gitignore
index 61fa676..8964d44 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@ __pycache__/
 *.so
 
 # Distribution / packaging
+_build/
 .Python
 build/
 develop-eggs/
@@ -163,4 +164,4 @@ cython_debug/
 /.idea/
 
 # Mac/OSX
-.DS_Store
\ No newline at end of file
+.DS_Store