diff --git a/configs/picosam9g45_defconfig b/configs/picosam9g45_defconfig
index 0b6234f..df979f9 100644
--- a/configs/picosam9g45_defconfig
+++ b/configs/picosam9g45_defconfig
@@ -1,4 +1,5 @@
 CONFIG_ARM=y
+CONFIG_SYS_THUMB_BUILD=y
 CONFIG_ARCH_AT91=y
 CONFIG_SYS_TEXT_BASE=0x23f00000
 CONFIG_TARGET_PICOSAM9G45=y