diff --git a/src/FreqWindow.cpp b/src/FreqWindow.cpp
index 9bc82700d..9110edac1 100644
--- a/src/FreqWindow.cpp
+++ b/src/FreqWindow.cpp
@@ -493,6 +493,9 @@ FreqWindow::FreqWindow(wxWindow * parent, wxWindowID id,
 
    Layout();
    Fit();
+   // Bug 1607:
+   Center();
+
    SetMinSize(GetSize());
    mAlgChoice->SetFocus();
 
diff --git a/src/export/Export.cpp b/src/export/Export.cpp
index a4dde5947..70df95f18 100644
--- a/src/export/Export.cpp
+++ b/src/export/Export.cpp
@@ -1326,6 +1326,7 @@ ExportMixerDialog::ExportMixerDialog( const TrackList *tracks, bool selectedOnly
    SetSizeHints( 640, 480, 20000, 20000 );
 
    SetSize( 640, 480 );
+   Center();
 }
 
 ExportMixerDialog::~ExportMixerDialog()