diff --git a/rbutil/mkimxboot/mkimxboot.c b/rbutil/mkimxboot/mkimxboot.c
index 8806167078..c33c0404c0 100644
--- a/rbutil/mkimxboot/mkimxboot.c
+++ b/rbutil/mkimxboot/mkimxboot.c
@@ -331,6 +331,9 @@ enum imx_error_t mkimxboot(const char *infile, const char *bootfile,
     const char *outfile, struct imx_option_t opt)
 {
     /* Dump tables */
+    if(opt.fw_variant > VARIANT_COUNT) {
+        return IMX_ERROR;
+    }
     dump_imx_dev_info("[INFO] ");
     /* compute MD5 sum of the file */
     uint8_t file_md5sum[16];
diff --git a/rbutil/rbutilqt/base/bootloaderinstallimx.cpp b/rbutil/rbutilqt/base/bootloaderinstallimx.cpp
index e25244f80a..c085b30346 100644
--- a/rbutil/rbutilqt/base/bootloaderinstallimx.cpp
+++ b/rbutil/rbutilqt/base/bootloaderinstallimx.cpp
@@ -49,6 +49,7 @@ void BootloaderThreadImx::run(void)
     struct imx_option_t opt;
     opt.debug = false;
     opt.output = IMX_DUALBOOT;
+    opt.fw_variant = VARIANT_DEFAULT;
 
     m_error = mkimxboot(m_inputfile.toLocal8Bit().constData(),
             m_bootfile.toLocal8Bit().constData(),