diff --git a/include/configs/VCMA9.h b/include/configs/VCMA9.h
index 42af34f..de7d5c2 100644
--- a/include/configs/VCMA9.h
+++ b/include/configs/VCMA9.h
@@ -20,6 +20,8 @@
  * High Level Configuration Options
  * (easy to change)
  */
+#define CONFIG_SYS_THUMB_BUILD
+
 #define CONFIG_S3C24X0		/* This is a SAMSUNG S3C24x0-type SoC */
 #define CONFIG_S3C2410		/* specifically a SAMSUNG S3C2410 SoC */
 #define CONFIG_VCMA9		/* on a MPL VCMA9 Board  */