diff --git a/include/configs/koelsch.h b/include/configs/koelsch.h
index ad6eecd627a..8cee73b2ddb 100644
--- a/include/configs/koelsch.h
+++ b/include/configs/koelsch.h
@@ -35,6 +35,7 @@
 #define CONFIG_CMD_SF
 #define CONFIG_CMD_SPI
 #define CONFIG_SYS_TEXT_BASE	0xE6304000
+#define CONFIG_SYS_THUMB_BUILD
 
 #define	CONFIG_CMDLINE_TAG
 #define	CONFIG_SETUP_MEMORY_TAGS