diff --git a/EmbeddedPkg/Ebl/Main.c b/EmbeddedPkg/Ebl/Main.c
index e4879bcf97..f1665627aa 100644
--- a/EmbeddedPkg/Ebl/Main.c
+++ b/EmbeddedPkg/Ebl/Main.c
@@ -557,6 +557,8 @@ ProcessCmdLine (
           // if any command fails stop processing CmdLine
           break;
         }
+      } else {
+        AsciiPrint ("The command '%a' is not supported.\n", Argv[0]);
       } 
     } 
   }