diff --git a/src/.gitignore b/src/.gitignore
index f314dfc6f4..15ce18d971 100644
--- a/src/.gitignore
+++ b/src/.gitignore
@@ -27,6 +27,11 @@
 /*_ssa.h
 /*_ssa.cpp
 
+/bond_special.h
+/bond_special.cpp
+/fix_momentum_chunk.cpp
+/fix_momentum_chunk.h
+
 /kim_*.cpp
 /kim_*.h
 /pair_kim.cpp