diff --git a/include/wx/utils.h b/include/wx/utils.h
index 4b713c73a6..3f10fd277f 100644
--- a/include/wx/utils.h
+++ b/include/wx/utils.h
@@ -173,7 +173,7 @@ enum
 // If flags contain wxEXEC_SYNC, return -1 on failure and the exit code of the
 // process if everything was ok. Otherwise (i.e. if wxEXEC_ASYNC), return 0 on
 // failure and the PID of the launched process if ok.
-WXDLLEXPORT long wxExecute(char **argv, int flags = wxEXEC_ASYNC,
+WXDLLEXPORT long wxExecute(wxChar **argv, int flags = wxEXEC_ASYNC,
                            wxProcess *process = (wxProcess *) NULL);
 WXDLLEXPORT long wxExecute(const wxString& command, int flags = wxEXEC_ASYNC,
                            wxProcess *process = (wxProcess *) NULL);
diff --git a/src/msw/utilsexc.cpp b/src/msw/utilsexc.cpp
index 69ee8c8c46..3894aaeea7 100644
--- a/src/msw/utilsexc.cpp
+++ b/src/msw/utilsexc.cpp
@@ -892,16 +892,18 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler)
 #endif // Win16/32
 }
 
-long wxExecute(char **argv, int flags, wxProcess *handler)
+long wxExecute(wxChar **argv, int flags, wxProcess *handler)
 {
     wxString command;
 
-    while ( *argv != NULL )
+    for ( ;; )
     {
-        command << *argv++ << ' ';
-    }
+        command += *argv++;
+        if ( !*argv )
+            break;
 
-    command.RemoveLast();
+        command += _T(' ');
+    }
 
     return wxExecute(command, flags, handler);
 }