diff --git a/assembler/.gitignore b/assembler/.gitignore
index d210d56f..351f4f73 100644
--- a/assembler/.gitignore
+++ b/assembler/.gitignore
@@ -4,6 +4,7 @@ Makefile.in
 aclocal.m4
 autom4te.cache
 configure
+configure.lineno
 config.log
 config.status
 depcomp