diff --git a/src/modules/traceback.c b/src/modules/traceback.c
index 0bbd0246..42d97dcb 100644
--- a/src/modules/traceback.c
+++ b/src/modules/traceback.c
@@ -1,3 +1,4 @@
+#include "pocketpy/objects/base.h"
 #include "pocketpy/pocketpy.h"
 #include <stdlib.h>
 
diff --git a/src/modules/unicodedata.c b/src/modules/unicodedata.c
index b371eb26..9ac02f53 100644
--- a/src/modules/unicodedata.c
+++ b/src/modules/unicodedata.c
@@ -1,4 +1,5 @@
 #include "pocketpy/common/str.h"
+#include "pocketpy/objects/base.h"
 #include "pocketpy/pocketpy.h"
 
 const static c11_u32_range kEastAsianWidthRanges[] = {