diff --git a/Makefile b/Makefile
index 15702f930dd7..ffcda4b707a3 100644
--- a/Makefile
+++ b/Makefile
@@ -1233,7 +1233,7 @@ rpm: include/config/kernel.release FORCE
 # Brief documentation of the typical targets used
 # ---------------------------------------------------------------------------
 
-boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
+boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/rk*_defconfig)
 boards := $(notdir $(boards))
 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
 board-dirs := $(sort $(notdir $(board-dirs:/=)))