diff --git a/.gitignore b/.gitignore
index eac95e9..00bd471 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@
 tags
 .DS_Store
 .ruby-version
+iterate.dat
 /spec/dump_dbl.t
 /spec/dump_int.t
 /spec/dump_mult_dbl.t