diff --git a/EmbeddedPkg/Universal/MmcDxe/MmcDebug.c b/EmbeddedPkg/Universal/MmcDxe/MmcDebug.c
index cf1b97fb9e..3cbd2b9655 100644
--- a/EmbeddedPkg/Universal/MmcDxe/MmcDebug.c
+++ b/EmbeddedPkg/Universal/MmcDxe/MmcDebug.c
@@ -8,16 +8,14 @@
 
 #include "Mmc.h"
 
-#if !defined (MDEPKG_NDEBUG)
-CONST CHAR8  *mStrUnit[] = {
+STATIC CONST CHAR8  *mStrUnit[] = {
   "100kbit/s", "1Mbit/s", "10Mbit/s", "100MBit/s",
   "Unknown",   "Unknown", "Unknown",  "Unknown"
 };
-CONST CHAR8  *mStrValue[] = {
+STATIC CONST CHAR8  *mStrValue[] = {
   "1.0",     "1.2",     "1.3",     "1.5", "2.0", "2.5", "3.0", "3.5", "4.0", "4.5", "5.0",
   "Unknown", "Unknown", "Unknown", "Unknown"
 };
-#endif
 
 VOID
 PrintCID (