diff --git a/CMakeLists.txt b/CMakeLists.txt
index fb215ba8c..f75b12d45 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,7 +55,6 @@ install( FILES
            core/form.h
            core/generator.h
            core/global.h
-           core/observer.h
            core/okular_export.h
            core/page.h
            core/pagesize.h