diff --git a/.gitignore b/.gitignore
index 773f4ad..affeba8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 cow-*
 *.a
 *.so
+*.o
 obj/
diff --git a/cow.o b/cow.o
deleted file mode 100644
index dd48963..0000000
Binary files a/cow.o and /dev/null differ