diff --git a/binfmt/Makefile b/binfmt/Makefile
index e9aca9b5783..aba9653a357 100644
--- a/binfmt/Makefile
+++ b/binfmt/Makefile
@@ -60,7 +60,7 @@ endif
 # Builtin application interfaces
 
 ifeq ($(CONFIG_BUILTIN),y)
-CSRCS += builtin.c
+BINFMT_CSRCS += builtin.c
 endif
 
 # Add configured binary modules
diff --git a/binfmt/binfmt_initialize.c b/binfmt/binfmt_initialize.c
index 8f9a8dac5f4..20d832ea09b 100644
--- a/binfmt/binfmt_initialize.c
+++ b/binfmt/binfmt_initialize.c
@@ -45,6 +45,8 @@
 #include <nuttx/binfmt/nxflat.h>
 #include <nuttx/lib/builtin.h>
 
+#include "binfmt.h"
+
 #ifndef CONFIG_BINFMT_DISABLE
 
 /****************************************************************************