diff --git a/src/plugins/projectexplorer/runcontrol.cpp b/src/plugins/projectexplorer/runcontrol.cpp
index b43c7fe3e83..39f2af549a2 100644
--- a/src/plugins/projectexplorer/runcontrol.cpp
+++ b/src/plugins/projectexplorer/runcontrol.cpp
@@ -1666,9 +1666,9 @@ void RunWorker::reportFailure(const QString &msg)
  * Appends a message in the specified \a format to
  * the owning RunControl's \uicontrol{Application Output} pane.
  */
-void RunWorker::appendMessage(const QString &msg, OutputFormat format)
+void RunWorker::appendMessage(const QString &msg, OutputFormat format, bool appendNewLine)
 {
-    if (msg.endsWith('\n'))
+    if (!appendNewLine || msg.endsWith('\n'))
         emit d->runControl->appendMessage(msg, format);
     else
         emit d->runControl->appendMessage(msg + '\n', format);
diff --git a/src/plugins/projectexplorer/runcontrol.h b/src/plugins/projectexplorer/runcontrol.h
index d33d7071625..84a5b5c1667 100644
--- a/src/plugins/projectexplorer/runcontrol.h
+++ b/src/plugins/projectexplorer/runcontrol.h
@@ -67,7 +67,7 @@ public:
     QVariant recordedData(const QString &channel) const;
 
     // Part of read-only interface of RunControl for convenience.
-    void appendMessage(const QString &msg, Utils::OutputFormat format);
+    void appendMessage(const QString &msg, Utils::OutputFormat format, bool appendNewLine = true);
     void appendMessageChunk(const QString &msg, Utils::OutputFormat format);
     IDeviceConstPtr device() const;
 
diff --git a/src/plugins/valgrind/valgrindengine.cpp b/src/plugins/valgrind/valgrindengine.cpp
index 58919333f17..977ca797758 100644
--- a/src/plugins/valgrind/valgrindengine.cpp
+++ b/src/plugins/valgrind/valgrindengine.cpp
@@ -39,8 +39,10 @@ ValgrindToolRunner::ValgrindToolRunner(RunControl *runControl)
 
     m_settings.fromMap(runControl->settingsData(ANALYZER_VALGRIND_SETTINGS));
 
-    connect(&m_runner, &ValgrindRunner::appendMessage,
-            this, &ValgrindToolRunner::appendMessage);
+    connect(&m_runner,
+            &ValgrindRunner::appendMessage,
+            this,
+            [this](const QString &msg, Utils::OutputFormat format) { appendMessage(msg, format); });
     connect(&m_runner, &ValgrindRunner::valgrindExecuted,
             this, [this](const QString &commandLine) {
         appendMessage(commandLine, NormalMessageFormat);