diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 87892aaf127..aab2844e138 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,9 @@
 2013-07-09  Jason Merrill  <jason@redhat.com>
 
+	PR c++/57545
+	* pt.c (convert_nontype_argument) [INTEGER_CST]: Force the
+	argument to have the exact type of the parameter.
+
 	PR c++/57551
 	* semantics.c (cxx_eval_indirect_ref): Don't try to look through
 	a POINTER_PLUS_EXPR for type punning diagnostic.
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index 23229a98d36..877d3b72979 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -5620,6 +5620,10 @@ convert_nontype_argument (tree type, tree expr, tsubst_flags_t complain)
 	  else
 	    return NULL_TREE;
 	}
+
+      /* Avoid typedef problems.  */
+      if (TREE_TYPE (expr) != type)
+	expr = fold_convert (type, expr);
     }
   /* [temp.arg.nontype]/5, bullet 2
 
diff --git a/gcc/testsuite/g++.dg/debug/template2.C b/gcc/testsuite/g++.dg/debug/template2.C
new file mode 100644
index 00000000000..9f5bcd9b101
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/template2.C
@@ -0,0 +1,14 @@
+// PR c++/57545
+
+template<typename T, long unsigned int N>
+struct array {
+    T data[N];
+};
+
+template<typename T>
+struct derived {
+    typedef long unsigned int size_type;
+    static const size_type n = 42;
+
+    array<int, n> a;
+};