diff --git a/xembed-sni-proxy/CMakeLists.txt b/xembed-sni-proxy/CMakeLists.txt
--- a/xembed-sni-proxy/CMakeLists.txt
+++ b/xembed-sni-proxy/CMakeLists.txt
@@ -58,7 +58,7 @@
     Qt5::DBus
     KF5::WindowSystem
     ${XCB_LIBS}
-    Xtst
+    ${X11_XTest_LIB}
 )
 
 install(TARGETS xembedsniproxy ${KDE_INSTALL_TARGETS_DEFAULT_ARGS})