diff --git a/.gitignore b/.gitignore
index b195d58b628ecfd9e71e94138acaf2668d6f819a..35570bc6005f19e51551947197b98d314b37fc7e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ org.springframework.spring-parent/.classpath
 org.springframework.spring-parent/.project
 org.springframework.test/test-output/
 target
+spring-build/lib/docbook