diff --git a/.gitignore b/.gitignore
index a6b34fd4f349371e57c978c13147c399459b5d10..89bd1003f71f4c984de63f864d2afc34edef0295 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,3 +31,5 @@ coverage
 # vim temp files
 .*.swp
 
+# Makefile's cache
+cache.mk