diff --git a/extern/libtommath/.gitignore b/extern/libtommath/.gitignore
index 86cbfa9b3b..3ce71e6d90 100644
--- a/extern/libtommath/.gitignore
+++ b/extern/libtommath/.gitignore
@@ -1,5 +1,6 @@
 lib/
 temp/
 *.o
+*.d
 *.l*
 .libs/