diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -160,7 +160,9 @@
 add_definitions(-DTRANSLATION_DOMAIN=\"libplasma5\")
 if (IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/po")
     ki18n_install(po)
-    kdoctools_install(po)
+    if (KF5DocTools_FOUND)
+        kdoctools_install(po)
+    endif()
 endif()
 add_subdirectory(src)