diff --git a/.gitignore b/.gitignore
index ba1367886e6..be349c26300 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ org.springframework.jdbc/derby.log
 org.springframework.spring-parent/.classpath
 org.springframework.spring-parent/.project
 org.springframework.test/test-output/
+spring-build/lib/docbook