diff --git a/linux/linux.mk b/linux/linux.mk
index 78e589e486..672ce485c7 100644
--- a/linux/linux.mk
+++ b/linux/linux.mk
@@ -68,7 +68,11 @@ LINUX_VERSION_PROBED = $(shell $(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-
 ifeq ($(BR2_LINUX_KERNEL_USE_INTREE_DTS),y)
 KERNEL_DTS_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
 else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),y)
-KERNEL_DTS_NAME = $(basename $(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH))))
+# We keep only the .dts files, so that the user can specify both .dts
+# and .dtsi files in BR2_LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
+# copied to arch/<arch>/boot/dts, but only the .dts files will
+# actually be generated as .dtb.
+KERNEL_DTS_NAME = $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)))))
 endif
 
 ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT)$(KERNEL_DTS_NAME),y)