diff --git a/.gitignore b/.gitignore
index cd21f4d28..d454503d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 # Allow Half-Life-specific files that would otherwise be ignored
 !utils/procinfo/lib/win32_vc6/procinfo.lib
+build/