diff --git a/.gitattributes b/.gitattributes
index e5e837d1e7f..9134554730d 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -13,3 +13,8 @@
 *.png binary
 *.jpg binary
 *.pdf binary
+
+# Configure github-linguist
+*.inc linguist-language=Fortran
+.build_rtd_docs/** linguist-documentation
+.doc/** linguist-documentation