diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index b68a0b5..f4ded2e 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -12,6 +12,7 @@
 
 #include "Python-ast.h"
 #undef Yield   /* undefine macro conflicting with <winbase.h> */
+#include "pycore_object.h"
 #include "pycore_pyerrors.h"
 #include "pycore_pylifecycle.h"
 #include "pycore_pystate.h"