diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000000..1832fa8499
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,4 @@
+*.sig linguist-detectable=false
+*.pac linguist-detectable=false
+*.bif linguist-language=C++
+testing/btest/Baseline/** linguist-detectable=false