diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -10,11 +10,12 @@
 ecm_qt_declare_logging_category(kauthdebug_SRCS HEADER kauthdebug.h IDENTIFIER KAUTH CATEGORY_NAME kf5.kauth)
 
 if(TARGET Qt5::Widgets)
-    set(libkauth_SRCS
+    # TODO KF6 Rename KAuth to KAuthWidgets
+    # TODO KAuthCore should be installed also when no widgets available, in the header installation etc, so ignoring for now
+    set(libkauth_core_SRCS
         kauthaction.cpp
         kauthactionreply.cpp
         kauthexecutejob.cpp
-        kauthobjectdecorator.cpp
         AuthBackend.cpp
         BackendsManager.cpp
         HelperProxy.cpp
@@ -25,14 +26,28 @@
         ${KAuth_QM_LOADER}
     )
 
+    add_library(KF5AuthCore ${libkauth_core_SRCS})
+    target_link_libraries(KF5AuthCore PUBLIC Qt5::Core KF5::CoreAddons)  # for KJob
+    target_link_libraries(KF5AuthCore PRIVATE Qt5::DBus)
+    target_include_directories(KF5AuthCore INTERFACE "$<INSTALL_INTERFACE:${KDE_INSTALL_INCLUDEDIR_KF5}/KAuth>")
+    install(TARGETS KF5AuthCore EXPORT KF5AuthTargets ${KF5_INSTALL_TARGETS_DEFAULT_ARGS})
+    set_target_properties(KF5AuthCore PROPERTIES VERSION  ${KAUTH_VERSION_STRING}
+                                            SOVERSION ${KAUTH_SOVERSION}
+                                            EXPORT_NAME AuthCore)
+
+    set(libkauth_SRCS
+        ${kauthdebug_SRCS}
+        kauthobjectdecorator.cpp
+    )
+
     add_library(KF5Auth ${libkauth_SRCS})
     generate_export_header(KF5Auth BASE_NAME KAuth)
     add_library(KF5::Auth ALIAS KF5Auth)
 
     target_include_directories(KF5Auth INTERFACE "$<INSTALL_INTERFACE:${KDE_INSTALL_INCLUDEDIR_KF5}/KAuth>")
 
-    target_link_libraries(KF5Auth PUBLIC Qt5::Core KF5::CoreAddons)  # for KJob
-    target_link_libraries(KF5Auth PRIVATE Qt5::Widgets Qt5::DBus)
+    target_link_libraries(KF5Auth PUBLIC KF5AuthCore)
+    target_link_libraries(KF5Auth PRIVATE Qt5::Widgets)
     set_target_properties(KF5Auth PROPERTIES VERSION   ${KAUTH_VERSION_STRING}
                                             SOVERSION ${KAUTH_SOVERSION}
                                             EXPORT_NAME Auth