diff --git a/scripts/mkimage b/scripts/mkimage
index f2544683f3..3b692b5047 100755
--- a/scripts/mkimage
+++ b/scripts/mkimage
@@ -177,7 +177,7 @@ EOF
     mcopy $RELEASE_DIR/3rdparty/bootloader/start.elf ::
     mcopy $RELEASE_DIR/3rdparty/bootloader/config.txt ::
       
-    if [ -d $RELEASE_DIR/3rdparty/bootloader/dt-blob.bin ]; then
+    if [ -f $RELEASE_DIR/3rdparty/bootloader/dt-blob.bin ]; then
       mcopy $RELEASE_DIR/3rdparty/bootloader/dt-blob.bin ::
     fi