diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index fa44295..a91ccf4 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -617,7 +617,7 @@
 
 		s = strchr(cmd, '.');
 
-		if (!strcmp(s, ".raw")) {
+		if (s && !strcmp(s, ".raw")) {
 			raw = 1;
 
 			if (arg_off(argv[3], &dev, &off, &size))