diff --git a/.gitattributes b/.gitattributes
index 5d75af9f3aba..93f3f49a916c 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -26,3 +26,5 @@ warnings.h linguist-generated
 *.t linguist-language=Perl
 *.h linguist-language=C
 *.fnc linguist-language=Text
+*.inc linguist-language=C
+cpan/Math-BigInt/t/*.inc linguist-language=Perl