diff --git a/src/win-config_sel.c b/src/win-config_sel.c
index 9e3ef03..5ce9427 100644
--- a/src/win-config_sel.c
+++ b/src/win-config_sel.c
@@ -102,7 +102,7 @@ static BOOL CALLBACK config_selection_dlgproc(HWND hdlg, UINT message, WPARAM wP
                                 strcat(s, "configs\\");
                                 pclog("Dir %s\n", s);
 
-                                if (!getsfile(hdlg, "Configuration (*.CFG)\0*.CFG\0All files (*.*)\0*.*\0", "", s))
+                                if (!getsfile(hdlg, "Configuration (*.CFG)\0*.CFG\0All files (*.*)\0*.*\0", "", s, "cfg"))
                                 {
                                         config_open(hdlg);
                                         
diff --git a/src/win-hdconf.c b/src/win-hdconf.c
index 184b370..d53e86c 100644
--- a/src/win-hdconf.c
+++ b/src/win-hdconf.c
@@ -205,7 +205,7 @@ static BOOL CALLBACK hdnew_dlgproc(HWND hdlg, UINT message, WPARAM wParam, LPARA
                         return TRUE;
 
                         case IDC_CFILE:
-                        if (!getsfile(hdlg, "Hard disc image (*.IMG)\0*.IMG\0All files (*.*)\0*.*\0", "", NULL))
+                        if (!getsfile(hdlg, "Hard disc image (*.IMG)\0*.IMG\0All files (*.*)\0*.*\0", "", NULL, "img"))
                         {
                                 h = GetDlgItem(hdlg, IDC_EDITC);
                                 SendMessage(h, WM_SETTEXT, 0, (LPARAM)openfilestring);
diff --git a/src/win.c b/src/win.c
index e839c5c..55e4bb7 100644
--- a/src/win.c
+++ b/src/win.c
@@ -818,7 +818,7 @@ int getfile(HWND hwnd, char *f, char *fn)
         return 1;
 }
 
-int getsfile(HWND hwnd, char *f, char *fn, char *dir)
+int getsfile(HWND hwnd, char *f, char *fn, char *dir, char *ext)
 {
         OPENFILENAME ofn;       // common dialog box structure
         BOOL r;
@@ -842,6 +842,7 @@ int getsfile(HWND hwnd, char *f, char *fn, char *dir)
         ofn.nMaxFileTitle = 0;
         ofn.lpstrInitialDir = dir;
         ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
+        ofn.lpstrDefExt = ext;
 
         // Display the Open dialog box.
 
diff --git a/src/win.h b/src/win.h
index ed12875..2675995 100644
--- a/src/win.h
+++ b/src/win.h
@@ -34,7 +34,7 @@ void joystickconfig_open(HWND hwnd, int joy_nr, int type);
 extern char openfilestring[260];
 
 int getfile(HWND hwnd, char *f, char *fn);
-int getsfile(HWND hwnd, char *f, char *fn, char *dir);
+int getsfile(HWND hwnd, char *f, char *fn, char *dir, char *ext);
 
 extern int pause;