diff --git a/.gitignore b/.gitignore
index 4f694fc43..cae91287b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,7 @@ build/
 test/work/
 interfaces/cython/cantera/_cantera.h
 include/cantera/base/config.h
+include/cantera/base/config.h.build
 include/cantera/base/system.h.gch
 include/cantera/ext/
 interfaces/matlab/ctpath.m