diff --git a/reactos/drivers/storage/ide/uniata/config.h b/reactos/drivers/storage/ide/uniata/config.h
index 690acd4b0cd..cf75739ddc0 100644
--- a/reactos/drivers/storage/ide/uniata/config.h
+++ b/reactos/drivers/storage/ide/uniata/config.h
@@ -110,16 +110,17 @@
  #define  DEF_U64(x)     (x##ULL)
  #define  DEF_I64(x)     (x##LL)
 
- /* ReactOS-specific defines */
- #ifdef USE_REACTOS_DDK
-  #define DDKFASTAPI __attribute__((fastcall))
- #else //USE_REACTOS_DDK
+ #ifndef DDKAPI
+ #define DDKAPI          __attribute__((stdcall))
+ #endif
 
-  #define DDKAPI          __attribute__((stdcall))
-  #define DDKFASTAPI      __attribute__((fastcall))
-  #define DDKCDECLAPI     __attribute__((cdecl))
+ #ifndef DDKCDECLAPI
+ #define DDKCDECLAPI     __attribute__((cdecl))
+ #endif
 
- #endif  //DDKAPI
+ #ifndef DDKFASTAPI
+ #define DDKFASTAPI      __attribute__((fastcall))
+ #endif
 
  #define DECLSPEC_NAKED   __attribute__((naked))
 
@@ -128,11 +129,17 @@
  #define  DEF_U64(x)     (x##UI64)
  #define  DEF_I64(x)     (x##I64)
 
- /* ReactOS-specific defines */
+ #ifndef DDKAPI
+ #define DDKAPI          __stdcall
+ #endif
 
-  #define DDKAPI          __stdcall
-  #define DDKFASTAPI      __fastcall
-  #define DDKCDECLAPI     _cdecl
+ #ifndef DDKCDECLAPI
+ #define DDKCDECLAPI     _cdecl
+ #endif
+
+ #ifndef DDKFASTAPI
+ #define DDKFASTAPI      __fastcall
+ #endif
 
  #define DECLSPEC_NAKED   __declspec(naked)