diff --git a/Objects/abstract.c b/Objects/abstract.c
index 2f887aa..11e145f 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -331,7 +331,7 @@
 {
     if (!PyObject_CheckBuffer(obj)) {
         PyErr_Format(PyExc_TypeError,
-                     "'%100s' does not support the buffer interface",
+                     "'%.100s' does not support the buffer interface",
                      Py_TYPE(obj)->tp_name);
         return -1;
     }