diff --git a/src/gui/dialogs/monitor_volume_adj.cpp b/src/gui/dialogs/monitor_volume_adj.cpp
index 5c06b983..5b1c5155 100644
--- a/src/gui/dialogs/monitor_volume_adj.cpp
+++ b/src/gui/dialogs/monitor_volume_adj.cpp
@@ -23,7 +23,7 @@
 #include <wx/sizer.h>
 #include "monitor_volume_adj.h"
 
-MontiorVolumeAdjPopup::MontiorVolumeAdjPopup( wxWindow* parent, ConfigurationDataElement<float>& configVal )
+MonitorVolumeAdjPopup::MonitorVolumeAdjPopup( wxWindow* parent, ConfigurationDataElement<float>& configVal )
     : wxPopupTransientWindow(parent)
     , configVal_(configVal)
 {
@@ -39,7 +39,7 @@ MontiorVolumeAdjPopup::MontiorVolumeAdjPopup( wxWindow* parent, ConfigurationDat
     Layout();
     
     // Link event handlers
-    volumeSlider_->Connect(wxEVT_SLIDER, wxCommandEventHandler(MontiorVolumeAdjPopup::OnSliderAdjusted), NULL, this);
+    volumeSlider_->Connect(wxEVT_SLIDER, wxCommandEventHandler(MonitorVolumeAdjPopup::OnSliderAdjusted), NULL, this);
     
     // Make popup show up to the left of (and above) mouse cursor position
     wxPoint pt = wxGetMousePosition();
@@ -48,12 +48,12 @@ MontiorVolumeAdjPopup::MontiorVolumeAdjPopup( wxWindow* parent, ConfigurationDat
     SetPosition( pt );
 }
 
-MontiorVolumeAdjPopup::~MontiorVolumeAdjPopup()
+MonitorVolumeAdjPopup::~MonitorVolumeAdjPopup()
 {
     // TBD
 }
 
-void MontiorVolumeAdjPopup::OnSliderAdjusted(wxCommandEvent& event)
+void MonitorVolumeAdjPopup::OnSliderAdjusted(wxCommandEvent& event)
 {
     configVal_ = volumeSlider_->GetValue();
 }
\ No newline at end of file
diff --git a/src/gui/dialogs/monitor_volume_adj.h b/src/gui/dialogs/monitor_volume_adj.h
index 6d66724f..8f22ee9a 100644
--- a/src/gui/dialogs/monitor_volume_adj.h
+++ b/src/gui/dialogs/monitor_volume_adj.h
@@ -28,13 +28,13 @@
 #include "config/ConfigurationDataElement.h"
 
 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
-// Class MontiorVolumeAdjPopup
+// Class MonitorVolumeAdjPopup
 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=
-class MontiorVolumeAdjPopup : public wxPopupTransientWindow
+class MonitorVolumeAdjPopup : public wxPopupTransientWindow
 {
     public:        
-        MontiorVolumeAdjPopup( wxWindow* parent, ConfigurationDataElement<float>& configVal );
-        ~MontiorVolumeAdjPopup();
+        MonitorVolumeAdjPopup( wxWindow* parent, ConfigurationDataElement<float>& configVal );
+        ~MonitorVolumeAdjPopup();
         
     protected:
         void OnSliderAdjusted(wxCommandEvent& event);
diff --git a/src/ongui.cpp b/src/ongui.cpp
index e5fe817e..7a540fa4 100644
--- a/src/ongui.cpp
+++ b/src/ongui.cpp
@@ -842,7 +842,7 @@ void MainFrame::OnSetMonitorTxAudio( wxCommandEvent& event )
 
 void MainFrame::OnSetMonitorTxAudioVol( wxCommandEvent& event )
 {
-    auto popup = new MontiorVolumeAdjPopup(this, wxGetApp().appConfiguration.monitorTxAudioVol);
+    auto popup = new MonitorVolumeAdjPopup(this, wxGetApp().appConfiguration.monitorTxAudioVol);
     popup->Popup();
 }
 
diff --git a/src/voicekeyer.cpp b/src/voicekeyer.cpp
index 04580c7e..728af381 100644
--- a/src/voicekeyer.cpp
+++ b/src/voicekeyer.cpp
@@ -178,7 +178,7 @@ void MainFrame::OnSetMonitorVKAudio( wxCommandEvent& event )
 
 void MainFrame::OnSetMonitorVKAudioVol( wxCommandEvent& event )
 {
-    auto popup = new MontiorVolumeAdjPopup(this, wxGetApp().appConfiguration.monitorVoiceKeyerAudioVol);
+    auto popup = new MonitorVolumeAdjPopup(this, wxGetApp().appConfiguration.monitorVoiceKeyerAudioVol);
     popup->Popup();
 }