diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 43d0ab301712..d0cea296d6ae 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-09-20  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/64954
+	* g++.dg/cpp0x/constexpr-ctor20.C: New.
+
 2017-09-20  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/81373
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-ctor20.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-ctor20.C
new file mode 100644
index 000000000000..d5df3f6b36c4
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-ctor20.C
@@ -0,0 +1,8 @@
+// PR c++/64954
+// { dg-do compile { target c++11 } }
+
+struct A {};
+int main() {
+    A a;
+    constexpr A b = a;
+}