diff --git a/MdePkg/Include/Library/DebugLib.h b/MdePkg/Include/Library/DebugLib.h
index 86bb71f8c8..93b6f8df34 100644
--- a/MdePkg/Include/Library/DebugLib.h
+++ b/MdePkg/Include/Library/DebugLib.h
@@ -39,20 +39,21 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #define DEBUG_WARN      0x00000002  // Warnings
 #define DEBUG_LOAD      0x00000004  // Load events
 #define DEBUG_FS        0x00000008  // EFI File system
-#define DEBUG_POOL      0x00000010  // Alloc & Free's
-#define DEBUG_PAGE      0x00000020  // Alloc & Free's
+#define DEBUG_POOL      0x00000010  // Alloc & Free (pool)
+#define DEBUG_PAGE      0x00000020  // Alloc & Free (page)
 #define DEBUG_INFO      0x00000040  // Informational debug messages
 #define DEBUG_DISPATCH  0x00000080  // PEI/DXE/SMM Dispatchers
 #define DEBUG_VARIABLE  0x00000100  // Variable
 #define DEBUG_BM        0x00000400  // Boot Manager
 #define DEBUG_BLKIO     0x00001000  // BlkIo Driver
-#define DEBUG_NET       0x00004000  // SNI Driver
+#define DEBUG_NET       0x00004000  // SNP Driver
 #define DEBUG_UNDI      0x00010000  // UNDI Driver
 #define DEBUG_LOADFILE  0x00020000  // LoadFile
 #define DEBUG_EVENT     0x00080000  // Event messages
 #define DEBUG_GCD       0x00100000  // Global Coherency Database changes
 #define DEBUG_CACHE     0x00200000  // Memory range cachability changes
-#define DEBUG_VERBOSE   0x00400000  // Detailed debug messages that may significantly impact boot performance
+#define DEBUG_VERBOSE   0x00400000  // Detailed debug messages that may
+                                    // significantly impact boot performance
 #define DEBUG_ERROR     0x80000000  // Error
 
 //