diff --git a/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c b/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c
index 97dfd0d817..19a734d0dc 100644
--- a/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c
+++ b/MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c
@@ -85,6 +85,8 @@ InternalGetPerformanceHobLog (
   and its end time stamp is zero, then the index of that log entry is returned;
   otherwise, the the number of log entries in the array is returned.
 
+  @param  PeiPerformanceLog       Pointer to the data structure containing PEI 
+                                  performance data.
   @param  Handle                  Pointer to environment specific context used
                                   to identify the component being measured.
   @param  Token                   Pointer to a Null-terminated ASCII string