diff --git a/.gitattributes b/.gitattributes
index e8d1106f270a901936b4048fa1ac90a3ae056963..25753d63f62fd23c6359e735ed2777344691ce9b 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1,2 @@
 TEST_LFS filter=lfs diff=lfs merge=lfs -text
+*.dat filter=lfs diff=lfs merge=lfs -text
diff --git a/mydata.dat b/mydata.dat
new file mode 100644
index 0000000000000000000000000000000000000000..293b66a3cba861cc1fe56fef4619f56ae046558e
--- /dev/null
+++ b/mydata.dat
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ca02d1583f3f32b47c7e1150a9fc513a87b601abdb3066b505f7c7ed5f8be7cb
+size 14