diff --git a/grade_lib/.gitignore b/grade_lib/.gitignore
new file mode 100644
index 000000000..7ea90c391
--- /dev/null
+++ b/grade_lib/.gitignore
@@ -0,0 +1,26 @@
+*.c
+*.d
+*.h
+*.obj
+*.exe
+*.prof
+*.err
+*.int
+*.int0
+*.int2
+*.int3
+*.date
+*.date0
+*.date3
+*.used
+*.pdb
+*.*_date
+*.mh
+*.mih
+Mercury.modules
+*.o
+*.opt
+*.optdate
+*.trans_opt
+*.trans_opt_date
+tags