diff --git a/reactos/ntoskrnl/ex/i386/interlck_asm.S b/reactos/ntoskrnl/ex/i386/interlck_asm.S
index 40c2c256c53..e6a8f3a2159 100644
--- a/reactos/ntoskrnl/ex/i386/interlck_asm.S
+++ b/reactos/ntoskrnl/ex/i386/interlck_asm.S
@@ -556,24 +556,5 @@ _Exi386InterlockedExchangeUlong@12:
 
     /* Return */
     ret 8
-
-/* Ugly hack: Use InterlockedExchange64 */
-.att_syntax
-.global @ExfpInterlockedExchange64@8
-@ExfpInterlockedExchange64@8:
-	pushl %ebx
-	pushl %esi
-	movl %ecx,%esi
-	movl (%edx),%ebx
-	movl 4(%edx),%ecx
-1:
-	movl (%esi),%eax
-	movl 4(%esi),%edx
-	LOCK
-	cmpxchg8b (%esi)
-	jnz 1b
-	popl %esi
-	popl %ebx
-	ret
 	
 /* EOF */
diff --git a/reactos/ntoskrnl/include/internal/ex.h b/reactos/ntoskrnl/include/internal/ex.h
index 65df7d70e30..09cb4c94ed8 100644
--- a/reactos/ntoskrnl/include/internal/ex.h
+++ b/reactos/ntoskrnl/include/internal/ex.h
@@ -1007,13 +1007,6 @@ ExTryToAcquireResourceExclusiveLite(
     IN PERESOURCE Resource
 );
 
-LONGLONG
-FASTCALL
-ExfpInterlockedExchange64(
-    LONGLONG volatile * Destination,
-    PLONGLONG Exchange
-);
-
 NTSTATUS
 ExpSetTimeZoneInformation(PTIME_ZONE_INFORMATION TimeZoneInformation);
 
@@ -1068,7 +1061,4 @@ XIPInit(
 #define ExfInterlockedCompareExchange64UL(Destination, Exchange, Comperand) \
    (ULONGLONG)ExfInterlockedCompareExchange64((PLONGLONG)(Destination), (PLONGLONG)(Exchange), (PLONGLONG)(Comperand))
 
-#define ExfpInterlockedExchange64UL(Target, Value) \
-   (ULONGLONG)ExfpInterlockedExchange64((PLONGLONG)(Target), (PLONGLONG)(Value))
-
 #endif /* __NTOSKRNL_INCLUDE_INTERNAL_EXECUTIVE_H */