diff --git a/Modules/_testclinic_limited.c b/Modules/_testclinic_limited.c
index 0b606c9857f..4273383816a 100644
--- a/Modules/_testclinic_limited.c
+++ b/Modules/_testclinic_limited.c
@@ -1,3 +1,9 @@
+// _testclinic_limited can built with the Py_BUILD_CORE_BUILTIN macro defined
+// if one of the Modules/Setup files asks to build it as "static" (gh-109723).
+#undef Py_BUILD_CORE
+#undef Py_BUILD_CORE_MODULE
+#undef Py_BUILD_CORE_BUILTIN
+
 // For now, only limited C API 3.13 is supported
 #define Py_LIMITED_API 0x030d0000