diff --git a/configs/openrd_base_defconfig b/configs/openrd_base_defconfig
index 067ddbc..2abf3ab 100644
--- a/configs/openrd_base_defconfig
+++ b/configs/openrd_base_defconfig
@@ -1,4 +1,5 @@
 CONFIG_ARM=y
+CONFIG_SYS_THUMB_BUILD=y
 CONFIG_KIRKWOOD=y
 CONFIG_TARGET_OPENRD=y
 CONFIG_IDENT_STRING="\nOpenRD-Base"