diff --git a/reactos/ntoskrnl/include/internal/i386/ke.h b/reactos/ntoskrnl/include/internal/i386/ke.h
index 0009428d4d4..64d1c1310fc 100644
--- a/reactos/ntoskrnl/include/internal/i386/ke.h
+++ b/reactos/ntoskrnl/include/internal/i386/ke.h
@@ -66,10 +66,6 @@ Ki386InitializeTss(
     IN PKGDTENTRY Gdt
 );
 
-VOID
-FASTCALL
-KiIdleLoop(VOID);
-
 VOID
 KiGdtPrepareForApplicationProcessorInit(ULONG Id);
 VOID
diff --git a/reactos/ntoskrnl/include/internal/ke.h b/reactos/ntoskrnl/include/internal/ke.h
index 01262518ccc..d3f2a5f5efe 100644
--- a/reactos/ntoskrnl/include/internal/ke.h
+++ b/reactos/ntoskrnl/include/internal/ke.h
@@ -992,7 +992,7 @@ KiRetireDpcList(
 );
 
 VOID
-FASTCALL
+NTAPI
 KiQuantumEnd(
     VOID
 );