Fix typo in exception message
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index cd081ad..ae27b7f 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -5132,7 +5132,7 @@
 			   const void **ptr)
 {
     PyErr_SetString(PyExc_TypeError,
-		    "cannot use unicode as modifyable buffer");
+		    "cannot use unicode as modifiable buffer");
     return -1;
 }