diff --git a/common/cmd_mfsl.c b/common/cmd_mfsl.c
index 8d4c1a3..9d1d875 100644
--- a/common/cmd_mfsl.c
+++ b/common/cmd_mfsl.c
@@ -355,19 +355,18 @@
 	unsigned int reg = 0;
 	unsigned int val = 0;
 
-	reg = (unsigned int)simple_strtoul (argv[1], NULL, 16);
-	val = (unsigned int)simple_strtoul (argv[2], NULL, 16);
-	if (argc < 1) {
+	if (argc < 2) {
 		printf ("Usage:\n%s\n", cmdtp->usage);
 		return 1;
 	}
+	reg = (unsigned int)simple_strtoul (argv[1], NULL, 16);
+	val = (unsigned int)simple_strtoul (argv[2], NULL, 16);
 	switch (reg) {
 	case 0x1:
 		if (argc > 2) {
 			MTS (val, rmsr);
 			NOP;
 			MFS (val, rmsr);
-
 		} else {
 			MFS (val, rmsr);
 		}
@@ -382,6 +381,7 @@
 		puts ("ESR");
 		break;
 	default:
+		puts ("Unsupported register\n");
 		return 1;
 	}
 	printf (": 0x%08lx\n", val);
@@ -408,10 +408,10 @@
 		" 3 - blocking control write\n");
 
 U_BOOT_CMD (rspr, 3, 1, do_rspr,
-		"rmsr    - read/write special purpose register\n",
+		"rspr    - read/write special purpose register\n",
 		"- reg_num [write value] read/write special purpose register\n"
-		" 0 - MSR - Machine status register\n"
-		" 1 - EAR - Exception address register\n"
-		" 2 - ESR - Exception status register\n");
+		" 1 - MSR - Machine status register\n"
+		" 3 - EAR - Exception address register\n"
+		" 5 - ESR - Exception status register\n");
 
 #endif