diff --git a/.gitignore b/.gitignore
index 067431411..ff4dd38bb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,6 +27,7 @@ libtool
 y.tab.[ch]
 lex.yy.c
 *keywords.c
+!proposal_keywords.c
 plugin_constructors.c
 Doxyfile
 apidoc/