diff --git a/Modules/_cursesmodule.c b/Modules/_cursesmodule.c
index 9bc74a6..5cb198e 100644
--- a/Modules/_cursesmodule.c
+++ b/Modules/_cursesmodule.c
@@ -890,7 +890,7 @@
     PyErr_SetString(PyCursesError, "no input");
     return NULL;
   } else if (rtn<=255)
-    return Py_BuildValue("c", rtn);
+    return Py_BuildValue("C", rtn);
   else
 #if defined(__NetBSD__)
     return PyUnicode_FromString(unctrl(rtn));
diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c
index b39da8e..6dc46ad 100644
--- a/Modules/arraymodule.c
+++ b/Modules/arraymodule.c
@@ -1141,14 +1141,14 @@
 				> PY_SSIZE_T_MAX / Py_SIZE(array)) {
 			return PyErr_NoMemory();
 		}
-		result = Py_BuildValue("O(cy#)O", 
+		result = Py_BuildValue("O(Cy#)O",
 			Py_TYPE(array), 
 			array->ob_descr->typecode,
 			array->ob_item,
 			Py_SIZE(array) * array->ob_descr->itemsize,
 			dict);
 	} else {
-		result = Py_BuildValue("O(c)O", 
+		result = Py_BuildValue("O(C)O",
 			Py_TYPE(array), 
 			array->ob_descr->typecode,
 			dict);