diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
index 35a6996ba3..c285a70ebb 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
@@ -1142,6 +1142,8 @@ FindFirstFreeToken (
 
   If no free token, allocate new tokens then return the free one.
 
+  @param RunningApsCount    The Running Aps count for this token.
+
   @retval    return the first free PROCEDURE_TOKEN.
 
 **/