diff --git a/devsetup.h b/devsetup.h
index ee5494da0..f72d5757f 100644
--- a/devsetup.h
+++ b/devsetup.h
@@ -103,10 +103,10 @@ extern int ptt(int nport, int ntx, int* iptt, int* nopen);
 
 #ifdef WIN32
 extern "C" {
-  const bool HRDInterfaceConnect(const wchar_t *host, const ushort);
+  bool HRDInterfaceConnect(const wchar_t *host, const ushort);
   void HRDInterfaceDisconnect();
-  const bool HRDInterfaceIsConnected();
-  const wchar_t* HRDInterfaceSendMessage(const wchar_t *msg);
+  bool HRDInterfaceIsConnected();
+  wchar_t* HRDInterfaceSendMessage(const wchar_t *msg);
   void HRDInterfaceFreeString(const wchar_t *lstring);
 }
 #endif
diff --git a/mainwindow.cpp b/mainwindow.cpp
index a9f9787dc..34a49286d 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1,4 +1,4 @@
-//-------------------------------------------------------------- MainWindow
+//------------------------------------------------------------- MainWindow
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include "devsetup.h"
diff --git a/rigclass.h b/rigclass.h
index b882bcf29..a11d4b85e 100644
--- a/rigclass.h
+++ b/rigclass.h
@@ -81,10 +81,10 @@ public:
 
 #ifdef WIN32
 extern "C" {
-  const bool HRDInterfaceConnect(const wchar_t *host, const ushort);
+  bool HRDInterfaceConnect(const wchar_t *host, const ushort);
   void HRDInterfaceDisconnect();
-  const bool HRDInterfaceIsConnected();
-  const wchar_t* HRDInterfaceSendMessage(const wchar_t *msg);
+  bool HRDInterfaceIsConnected();
+  wchar_t* HRDInterfaceSendMessage(const wchar_t *msg);
   void HRDInterfaceFreeString(const wchar_t *lstring);
 }
 #endif