1 files changed, 1 insertions, 1 deletions
diff --git a/config.mk b/config.mk
index 51b4783..9099c11 100644
--- a/config.mk
+++ b/config.mk
@@ -194,7 +194,7 @@ OBJCFLAGS += --gap-fill=0xff
 gccincdir := $(shell $(CC) -print-file-name=include)
 
 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS)		\
-	-D__KERNEL__
+	-D__KERNEL__ -DCONFIG_SERIAL_MULTI
 
 # Enable garbage collection of un-used sections for SPL
 ifeq ($(CONFIG_SPL_BUILD),y)