diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index 1c5b0e5aa66..6ff32b5abed 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -52,6 +52,7 @@ test_config(PyObject *self, PyObject *args)
 	    if (FATNAME != sizeof(TYPE)) \
     	    	return sizeof_error(#FATNAME, #TYPE, FATNAME, sizeof(TYPE))
 
+	CHECK_SIZEOF(SIZEOF_SHORT, short);
 	CHECK_SIZEOF(SIZEOF_INT, int);
 	CHECK_SIZEOF(SIZEOF_LONG, long);
 	CHECK_SIZEOF(SIZEOF_VOID_P, void*);
diff --git a/PC/config.h b/PC/config.h
index e146469c36c..3b81a450a4d 100644
--- a/PC/config.h
+++ b/PC/config.h
@@ -344,6 +344,7 @@ typedef unsigned long uintptr_t;
 #define Py_DEBUG
 #endif
 
+#define SIZEOF_SHORT 2
 #define SIZEOF_INT 4
 #define SIZEOF_LONG 4
 #define SIZEOF_LONG_LONG 8