diff --git a/linux/linux.mk b/linux/linux.mk
index b9e72107df..89ac31c2e1 100644
--- a/linux/linux.mk
+++ b/linux/linux.mk
@@ -525,7 +525,7 @@ include $(sort $(wildcard linux/linux-ext-*.mk))
 
 # Import linux-kernel-extensions from br2-externals
 include $(sort $(wildcard $(foreach ext,$(BR2_EXTERNAL_DIRS), \
-       $(ext)/linux/linux-ext-*.mk)))
+	$(ext)/linux/linux-ext-*.mk)))
 
 LINUX_PATCH_DEPENDENCIES += $(foreach ext,$(LINUX_EXTENSIONS),\
 	$(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))