diff --git a/autotests/CMakeLists.txt b/autotests/CMakeLists.txt
--- a/autotests/CMakeLists.txt
+++ b/autotests/CMakeLists.txt
@@ -7,6 +7,7 @@
 
 set(WACOM_COMMON_TEST_LIBS wacom_common Qt5::Test)
 set(WACOM_KDED_TEST_LIBS kded_wacomtablet_lib ${kded_wacomtablet_LIBS} Qt5::Test)
+include_directories(${LIBWACOM_INCLUDE_DIR} ${XORGWACOM_INCLUDE_DIR})
 
 add_subdirectory(faketablet)