diff --git a/EdkCompatibilityPkg/Foundation/Protocol/Performance/Performance.h b/EdkCompatibilityPkg/Foundation/Protocol/Performance/Performance.h
index 8cc3b2b2e3..9b0aecb5b1 100644
--- a/EdkCompatibilityPkg/Foundation/Protocol/Performance/Performance.h
+++ b/EdkCompatibilityPkg/Foundation/Protocol/Performance/Performance.h
@@ -54,7 +54,7 @@ typedef struct {
   UINT64            StartTick;
   UINT64            EndTick;
   EFI_GUID          GuidName;
-  UINT8             PdbFileName[EFI_PERF_PDBFILENAME_LENGTH];
+  CHAR8             PdbFileName[EFI_PERF_PDBFILENAME_LENGTH];
   UINT8             Phase;
 } EFI_GAUGE_DATA ;