diff --git a/include/mcapi.h b/include/mcapi.h
index ba426d8..278a8a4 100644
--- a/include/mcapi.h
+++ b/include/mcapi.h
@@ -62,8 +62,8 @@ MCAPI MC_RV MC_GetVersion(OUT MC_VERSION *pVersion);
 MCAPI MC_RV MC_GetStatus(OUT MC_UINT *pFlag);
 
 MCAPI MC_RV MC_Initialize(IN MC_VOID *pInitArgs);
-MCAPI MC_RV MC_Finalize();
-MCAPI MC_RV MC_Selftest();
+MCAPI MC_RV MC_Finalize(MC_VOID);
+MCAPI MC_RV MC_Selftest(MC_VOID);
 MCAPI MC_STR MC_GetErrorString(MC_RV nRv);
 
 MCAPI MC_RV MC_OpenSession(OUT MC_HSESSION *phSession);
diff --git a/include/mcapi_error.h b/include/mcapi_error.h
index c389d22..07ea9fc 100644
--- a/include/mcapi_error.h
+++ b/include/mcapi_error.h
@@ -55,7 +55,7 @@
 #define MC_ERR_NOT_ENOUGH_BUFFER			MC_ERR_BASE+27
 #define MC_ERR_NOT_SESSION_OBJECT			MC_ERR_BASE+28
 
-//MC_STR MC_GetErrorString(MC_RV rv);
+/* MC_STR MC_GetErrorString(MC_RV rv); */
 
 
 #endif /* _MC_HEADER_9330603E_D03D_4B8B_9746_9ED098D8A5CB */