diff --git a/meta/classes-recipe/kernel-fitimage.bbclass b/meta/classes-recipe/kernel-fitimage.bbclass
index 7980910aa8..92e236a0a4 100644
--- a/meta/classes-recipe/kernel-fitimage.bbclass
+++ b/meta/classes-recipe/kernel-fitimage.bbclass
@@ -590,8 +590,9 @@ fitimage_assemble() {
 
 	if [ -n "${EXTERNAL_KERNEL_DEVICETREE}" ]; then
 		dtbcount=1
-		for DTB in $(find "${EXTERNAL_KERNEL_DEVICETREE}" \( -name '*.dtb' -o -name '*.dtbo' \) -printf '%P\n' | sort); do
-			# Skip DTB if we've picked it up previously
+		for DTB in $(find "${EXTERNAL_KERNEL_DEVICETREE}" -name '*.dtb' -printf '%P\n' | sort) \
+		$(find "${EXTERNAL_KERNEL_DEVICETREE}" -name '*.dtbo' -printf '%P\n' | sort); do
+			# Skip DTB/DTBO if we've picked it up previously
 			echo "$DTBS" | tr ' ' '\n' | grep -xq "$DTB" && continue
 
 			DTBS="$DTBS $DTB"