diff --git a/utils/imxtools/sbtools/sb.c b/utils/imxtools/sbtools/sb.c
index c005b07ff7..145df39762 100644
--- a/utils/imxtools/sbtools/sb.c
+++ b/utils/imxtools/sbtools/sb.c
@@ -938,6 +938,8 @@ struct sb_file_t *sb_read_memory(void *_buf, size_t filesize, unsigned flags, vo
         memcpy(sb_file->real_key, real_key, 16);
         memcpy(sb_file->crypto_iv, buf, 16);
     }
+    else
+        valid_key = true;
 
     /* sections */
     if(!(flags & SB_RAW_MODE))