diff --git a/Misc/NEWS b/Misc/NEWS
index e5b37a9..07fc1f3 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -23,6 +23,8 @@
 
 - Silenced a trivial compiler warning in the sqlite module.
 
+- Fixed two format strings in the _collections module.
+
 
 What's New in Python 2.6 beta 3?
 ================================
diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index 4517811..82bfb14 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -670,7 +670,7 @@
 		return NULL;
 	}
 	if (((dequeobject *)deque)->maxlen != -1)
-		fmt = PyString_FromFormat("deque(%%r, maxlen=%i)", 
+		fmt = PyString_FromFormat("deque(%%r, maxlen=%" PY_FORMAT_SIZE_T "i)", 
 					((dequeobject *)deque)->maxlen);
 	else
 		fmt = PyString_FromString("deque(%r)");  
@@ -733,7 +733,7 @@
 	if (((dequeobject *)deque)->maxlen == -1)
 		fputs("])", fp);
 	else
-		fprintf(fp, "], maxlen=%d)", ((dequeobject *)deque)->maxlen);
+		fprintf(fp, "], maxlen=%" PY_FORMAT_SIZE_T "d)", ((dequeobject *)deque)->maxlen);
 	Py_END_ALLOW_THREADS
 	return 0;
 }