diff -Naru a/lib/console.c b/lib/console.c
--- a/lib/console.c	2019-11-28 13:59:02.099153788 +0100
+++ b/lib/console.c	2019-11-28 13:59:42.209153890 +0100
@@ -357,7 +357,11 @@
 	{  EFI_SECURITY_VIOLATION,     L"Security Violation"},
 
 	// warnings
-	{  EFI_WARN_UNKOWN_GLYPH,      L"Warning Unknown Glyph"},
+#ifndef EFI_WARN_UNKOWN_GLYPH
+	{  EFI_WARN_UNKNOWN_GLYPH,     L"Warning Unknown Glyph"},
+#else
+	{  EFI_WARN_UNKOWN_GLYPH,      L"Warning Unknown Glyph"},
+#endif
 	{  EFI_WARN_DELETE_FAILURE,    L"Warning Delete Failure"},
 	{  EFI_WARN_WRITE_FAILURE,     L"Warning Write Failure"},
 	{  EFI_WARN_BUFFER_TOO_SMALL,  L"Warning Buffer Too Small"}