diff --git a/NetworkPkg/UefiPxeBcDxe/PxeBcSupport.c b/NetworkPkg/UefiPxeBcDxe/PxeBcSupport.c
index 6ddcac718e..f918d6a298 100644
--- a/NetworkPkg/UefiPxeBcDxe/PxeBcSupport.c
+++ b/NetworkPkg/UefiPxeBcDxe/PxeBcSupport.c
@@ -1466,7 +1466,7 @@ PxeBcUniHexToUint8 (
 }
 
 /**
-  Calculate the elapsed time
+  Calculate the elapsed time.
 
   @param[in]      Private      The pointer to PXE private data
 
diff --git a/NetworkPkg/UefiPxeBcDxe/PxeBcSupport.h b/NetworkPkg/UefiPxeBcDxe/PxeBcSupport.h
index 797f607642..c82237be0e 100644
--- a/NetworkPkg/UefiPxeBcDxe/PxeBcSupport.h
+++ b/NetworkPkg/UefiPxeBcDxe/PxeBcSupport.h
@@ -475,7 +475,7 @@ PxeBcUniHexToUint8 (
   );
 
 /**
-  Calculate the elapsed time
+  Calculate the elapsed time.
 
   @param[in]      Private      The pointer to PXE private data