diff --git a/.gitignore b/.gitignore
index 021a8c74185..5cc4a0fdfa6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,7 +23,8 @@
 
 autom4te.cache
 config.cache
-config.h
+# GCC does not support in-tree builds, do not conceal a stray config.h:
+# config.h
 config.intl
 config.log
 config.status