diff --git a/libtaskmanager/CMakeLists.txt b/libtaskmanager/CMakeLists.txt
--- a/libtaskmanager/CMakeLists.txt
+++ b/libtaskmanager/CMakeLists.txt
@@ -49,7 +49,6 @@
         KF5::I18n
         KF5::KIOCore
         KF5::KIOWidgets
-        KF5::ProcessCore
         KF5::WaylandClient
         KF5::WindowSystem
 )
diff --git a/libtaskmanager/tasktools.cpp b/libtaskmanager/tasktools.cpp
--- a/libtaskmanager/tasktools.cpp
+++ b/libtaskmanager/tasktools.cpp
@@ -32,9 +32,7 @@
 #include <KSharedConfig>
 #include <KStartupInfo>
 #include <KWindowSystem>
-
-#include <processcore/processes.h>
-#include <processcore/process.h>
+#include <KProcessList>
 
 #include <config-X11.h>
 
@@ -505,17 +503,18 @@
         return KService::List();
     }
 
-    KSysGuard::Processes procs;
-    procs.updateOrAddProcess(pid);
+    auto proc = KProcessList::processInfo(pid);
+    if (!proc.isValid()) {
+        return KService::List();
+    }
 
-    KSysGuard::Process *proc = procs.getProcess(pid);
-    const QString &cmdLine = proc ? proc->command().simplified() : QString(); // proc->command has a trailing space???
+    const QString cmdLine = proc.command();
 
     if (cmdLine.isEmpty()) {
         return KService::List();
     }
 
-    return servicesFromCmdLine(cmdLine, proc->name(), rulesConfig);
+    return servicesFromCmdLine(cmdLine, proc.name(), rulesConfig);
 }
 
 KService::List servicesFromCmdLine(const QString &_cmdLine, const QString &processName,