diff --git a/ccpp/fxalloc/.gitignore b/ccpp/fxalloc/.gitignore
index ecfe0bc..de21ab4 100644
--- a/ccpp/fxalloc/.gitignore
+++ b/ccpp/fxalloc/.gitignore
@@ -1 +1,2 @@
+build
 sandbox
\ No newline at end of file