diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 000000000..7182d90d9
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,2 @@
+# indent: Modernize mem2str.
+6a80d6f9206eae2c867c45daa5cd3e7d6c6ad114