diff --git a/CMakeLists.txt b/CMakeLists.txt
index b7fa622..0cdde70 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,93 +1,93 @@
 if (CMAKE_VERSION VERSION_LESS "2.8.12")
     cmake_minimum_required(VERSION 2.8.9)
     set(HEAPTRACK_BUILD_GUI OFF)
 else()
     cmake_minimum_required(VERSION 2.8.12)
 endif()
 
 project(heaptrack)
 enable_testing()
 
 if(NOT CMAKE_BUILD_TYPE)
   message(STATUS "Setting build type to 'RelWithDebInfo' as none was specified.")
   set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING "Choose the type of build." FORCE)
 endif()
 
 set(HEAPTRACK_VERSION_MAJOR 1)
 set(HEAPTRACK_VERSION_MINOR 0)
 set(HEAPTRACK_VERSION_PATCH 0)
 set(HEAPTRACK_LIB_VERSION 1.0.0)
 set(HEAPTRACK_LIB_SOVERSION 1)
 set(HEAPTRACK_FILE_FORMAT_VERSION 2)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 
 find_package(Libunwind REQUIRED)
 find_package(Boost 1.41.0 REQUIRED COMPONENTS iostreams program_options)
 find_package(Threads REQUIRED)
 find_package(ZLIB REQUIRED)
 include(FeatureSummary)
 
 option(
   HEAPTRACK_BUILD_GUI
   "Disable this option to skip building the Qt5 / KF5 based GUI for heaptrack."
   On
 )
 
 if(HEAPTRACK_BUILD_GUI)
     find_package(Qt5 5.2.0 NO_MODULE OPTIONAL_COMPONENTS Widgets)
     find_package(ECM 1.0.0 NO_MODULE)
     if(Qt5_FOUND AND ECM_FOUND)
         set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
-            find_package(KF5 OPTIONAL_COMPONENTS CoreAddons I18n ItemModels ThreadWeaver ConfigWidgets KIO)
+            find_package(KF5 COMPONENTS CoreAddons I18n ItemModels ThreadWeaver ConfigWidgets KIO)
             find_package(KChart "2.6.0")
             set_package_properties(KChart PROPERTIES TYPE RECOMMENDED PURPOSE "Required for the heaptrack_gui executable. Get it from the kdiagram module.")
     endif()
 endif()
 
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Wpedantic")
 
 include (CheckCXXSourceCompiles)
 check_cxx_source_compiles(
     "#include <unordered_map>
     #include <atomic>
     thread_local int tls;
     int main() { return 0; }"
     HAVE_CXX11_SUPPORT)
 
 if (NOT HAVE_CXX11_SUPPORT)
     message(FATAL_ERROR "Your compiler is too old and does not support the required C++11 features.")
 endif()
 
 check_cxx_source_compiles(
     "#include <stdio_ext.h>
     #include <fcntl.h>
     #include <dlfcn.h>
     #include <link.h>
     int main() { return 0; }"
     HAVE_LINUX_HEADERS)
 
 if (NOT HAVE_LINUX_HEADERS)
     message(FATAL_ERROR "You are missing some Linux headers required to compile heaptrack.")
 endif()
 
 set(BIN_INSTALL_DIR "bin")
 set(LIB_SUFFIX "" CACHE STRING "Define suffix of directory name (32/64)")
 set(LIB_INSTALL_DIR "lib${LIB_SUFFIX}")
 set(LIBEXEC_INSTALL_DIR "${LIB_INSTALL_DIR}/heaptrack/libexec")
 
 file(RELATIVE_PATH LIBEXEC_REL_PATH
     "${CMAKE_INSTALL_PREFIX}/${BIN_INSTALL_DIR}"
     "${CMAKE_INSTALL_PREFIX}/${LIBEXEC_INSTALL_DIR}")
 
 file(RELATIVE_PATH LIB_REL_PATH
     "${CMAKE_INSTALL_PREFIX}/${BIN_INSTALL_DIR}"
     "${CMAKE_INSTALL_PREFIX}/${LIB_INSTALL_DIR}/heaptrack")
 
 add_subdirectory(3rdparty)
 add_subdirectory(src)
 add_subdirectory(tests)
 
 feature_summary(WHAT ALL FATAL_ON_MISSING_REQUIRED_PACKAGES)