diff --git a/src/plugins/remotelinux/linuxdevice.cpp b/src/plugins/remotelinux/linuxdevice.cpp
index 0ec48a41fe9..e11d6cd7db7 100644
--- a/src/plugins/remotelinux/linuxdevice.cpp
+++ b/src/plugins/remotelinux/linuxdevice.cpp
@@ -512,9 +512,9 @@ void LinuxProcessInterface::sendControlSignal(ControlSignal controlSignal)
     QTC_ASSERT(controlSignal != ControlSignal::KickOff, return);
     const qint64 pid = processId();
     QTC_ASSERT(pid, return); // TODO: try sending a signal based on process name
-    const QString args = QString::fromLatin1("-%1 %2")
+    const QString args = QString::fromLatin1("-%1 -%2")
             .arg(controlSignalToInt(controlSignal)).arg(pid);
-    CommandLine command = { "kill", args, CommandLine::Raw };
+    const CommandLine command = { "kill", args, CommandLine::Raw };
     // Note: This blocking call takes up to 2 ms for local remote.
     runInShell(command);
 }
diff --git a/src/plugins/remotelinux/remotelinuxsignaloperation.cpp b/src/plugins/remotelinux/remotelinuxsignaloperation.cpp
index a0dec6b269c..fbfdc7f1b40 100644
--- a/src/plugins/remotelinux/remotelinuxsignaloperation.cpp
+++ b/src/plugins/remotelinux/remotelinuxsignaloperation.cpp
@@ -43,7 +43,7 @@ RemoteLinuxSignalOperation::~RemoteLinuxSignalOperation() = default;
 
 static QString signalProcessGroupByPidCommandLine(qint64 pid, int signal)
 {
-    return QString::fromLatin1("kill -%1 %2").arg(signal).arg(pid);
+    return QString::fromLatin1("kill -%1 -%2").arg(signal).arg(pid);
 }
 
 void RemoteLinuxSignalOperation::run(const QString &command)