diff --git a/plugins/samplesource/perseus/perseusinput.cpp b/plugins/samplesource/perseus/perseusinput.cpp
index 17e1f0094..4ee9380c2 100644
--- a/plugins/samplesource/perseus/perseusinput.cpp
+++ b/plugins/samplesource/perseus/perseusinput.cpp
@@ -286,8 +286,6 @@ void PerseusInput::setDeviceCenterFrequency(quint64 freq_hz, const PerseusSettin
 
 bool PerseusInput::applySettings(const PerseusSettings& settings, bool force)
 {
-    QMutexLocker mutexLocker(&m_mutex);
-
     bool forwardChange = false;
     int sampleRateIndex = settings.m_devSampleRateIndex;
 
diff --git a/plugins/samplesource/perseus/perseusinput.h b/plugins/samplesource/perseus/perseusinput.h
index e3357813e..9973921c7 100644
--- a/plugins/samplesource/perseus/perseusinput.h
+++ b/plugins/samplesource/perseus/perseusinput.h
@@ -130,7 +130,6 @@ private:
     PerseusThread *m_perseusThread;
     perseus_descr *m_perseusDescriptor;
     std::vector<uint32_t> m_sampleRates;
-    QMutex m_mutex;
 
     bool openDevice();
     void closeDevice();