diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index f7b2aa6..db1516d 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -40,6 +40,7 @@
 
 #define PY_SSIZE_T_CLEAN
 #include "Python.h"
+#include "internal/pystate.h"
 #include "ucnhash.h"
 #include "bytes_methods.h"
 #include "stringlib/eq.h"