diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -24,7 +24,7 @@
 
 kde_target_enable_exceptions(alkimia PUBLIC)
 
-target_include_directories(alkimia PUBLIC ${MP_INCLUDE_DIR})
+target_include_directories(alkimia PRIVATE ${MP_INCLUDE_DIR})
 target_link_libraries(alkimia PUBLIC ${QT_USE_LIBSPREFIX}Core ${QT_USE_LIBSPREFIX}DBus ${MP_LIBRARIES})
 generate_export_header(alkimia BASE_NAME alk)
 
diff --git a/src/LibAlkimiaConfig.cmake.in b/src/LibAlkimiaConfig.cmake.in
--- a/src/LibAlkimiaConfig.cmake.in
+++ b/src/LibAlkimiaConfig.cmake.in
@@ -13,5 +13,5 @@
 include("${CMAKE_CURRENT_LIST_DIR}/LibAlkimia@ALKIMIA_PATH_SUFFIX@Targets.cmake")
 
 set_and_check(LIBALKIMIA_INCLUDE_DIR "@PACKAGE_INCLUDE_INSTALL_DIR@")
-set_property(TARGET Alkimia::alkimia APPEND PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${LIBALKIMIA_INCLUDE_DIR} "@MP_INCLUDE_DIR@")
+set_property(TARGET Alkimia::alkimia PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${LIBALKIMIA_INCLUDE_DIR} ${@MP_CMAKE_MODULE@_INCLUDE_DIR})
 message(STATUS "Found LibAlkimia: ${CMAKE_CURRENT_LIST_DIR}/LibAlkimia@ALKIMIA_PATH_SUFFIX@Config.cmake (found version \"@ALKIMIA_LIB_VERSION@\")")