diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5c4863c..f731775 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,7 +46,6 @@ set_package_properties(LibXml2 PROPERTIES
                       )
 
 
-find_package(DocBookXML4 "4.5")
 
 set_package_properties(DocBookXML4 PROPERTIES
                        TYPE REQUIRED