diff --git a/0.76b_My_PuTTY/windows/window.c b/0.76b_My_PuTTY/windows/window.c
index f99fcdf..23c72a8 100644
--- a/0.76b_My_PuTTY/windows/window.c
+++ b/0.76b_My_PuTTY/windows/window.c
@@ -5765,13 +5765,15 @@ if( (GetKeyState(VK_MENU)&0x8000) && (wParam==VK_SPACE) ) {
 
         // send escape seq
 
-        char* str = "\x1b_f2l";
-        backend_send(backend, str, strlen(str));
+        if (backend) {
+		char* str = "\x1b_f2l";
+        	backend_send(backend, str, strlen(str));
 
-        backend_send(backend, out, count);
+        	backend_send(backend, out, count);
 
-        char* str2 = "\x07";
-        backend_send(backend, str2, strlen(str2));
+        	char* str2 = "\x07";
+        	backend_send(backend, str2, strlen(str2));
+	}
 
         // don't forget to free memory :)
         free(out);