diff --git a/Libs/src/khicas/k_csdk.h b/Libs/src/khicas/k_csdk.h
index e05d7b97..964f41a5 100644
--- a/Libs/src/khicas/k_csdk.h
+++ b/Libs/src/khicas/k_csdk.h
@@ -141,7 +141,7 @@ extern "C" {
 #endif
 #endif
   inline int os_draw_string_medium_(int x,int y,const char * s){ return os_draw_string_medium(x,y,SDK_BLACK,SDK_WHITE,s,false);}
-  void GetKey(int * key);
+  int GetKey(int * key);
   int getkey(int allow_suspend); // transformed
   void enable_back_interrupt();
   inline void set_abort(){  enable_back_interrupt(); }