diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 4d371b8b9f2..10d38a18cab 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,7 @@
+2017-10-05  Jonathan Wakely  <jwakely@redhat.com>
+
+	* testsuite/20_util/to_chars/1.cc: Add dg-require-string-conversions.
+
 2017-10-04  Petr Ovtchenkov  <ptr@void-ptr.info>
 	    François Dumont  <fdumont@gcc.gnu.org>
 
diff --git a/libstdc++-v3/testsuite/20_util/to_chars/1.cc b/libstdc++-v3/testsuite/20_util/to_chars/1.cc
index bdd961104a2..12dfd3d49f3 100644
--- a/libstdc++-v3/testsuite/20_util/to_chars/1.cc
+++ b/libstdc++-v3/testsuite/20_util/to_chars/1.cc
@@ -17,6 +17,7 @@
 
 // { dg-options "-std=gnu++17" }
 // { dg-do run { target c++17 } }
+// { dg-require-string-conversions "" }
 
 #include <charconv>
 #include <string_view>