diff --git a/Lib/test/test_structmembers.py b/Lib/test/test_structmembers.py
index 145a16e..27db161 100644
--- a/Lib/test/test_structmembers.py
+++ b/Lib/test/test_structmembers.py
@@ -87,8 +87,8 @@
             'T_BOOL',
             'T_BYTE', 'T_UBYTE',
             'T_SHORT', 'T_USHORT',
-            'T_INT', #'T_UINT',
-            'T_LONG', #'T_ULONG',
+            'T_INT', 'T_UINT',
+            'T_LONG', 'T_ULONG',
             'T_PYSSIZET'
             ]
 
diff --git a/Python/structmember.c b/Python/structmember.c
index 8edc354..88ea6f8 100644
--- a/Python/structmember.c
+++ b/Python/structmember.c
@@ -187,12 +187,13 @@
 		}
 	case T_UINT:{
 		unsigned long ulong_val = PyLong_AsUnsignedLong(v);
-		if ((ulong_val == (unsigned int)-1) && PyErr_Occurred()) {
+		if ((ulong_val == (unsigned long)-1) && PyErr_Occurred()) {
 			/* XXX: For compatibility, accept negative int values
 			   as well. */
 			PyErr_Clear();
 			ulong_val = PyLong_AsLong(v);
-			if ((ulong_val == (unsigned int)-1) && PyErr_Occurred())
+			if ((ulong_val == (unsigned long)-1) &&
+			    PyErr_Occurred())
 				return -1;
 			*(unsigned int *)addr = (unsigned int)ulong_val;
 			WARN("Writing negative value into unsigned field");
@@ -216,7 +217,7 @@
 			   as well. */
 			PyErr_Clear();
 			*(unsigned long*)addr = PyLong_AsLong(v);
-			if ((*(unsigned long*)addr == (unsigned int)-1)
+			if ((*(unsigned long*)addr == (unsigned long)-1)
 			    && PyErr_Occurred())
 				return -1;
 			WARN("Writing negative value into unsigned field");