diff --git a/gcc/cp/cp-objcp-common.cc b/gcc/cp/cp-objcp-common.cc
index f06edf04ef0..85dde0459fa 100644
--- a/gcc/cp/cp-objcp-common.cc
+++ b/gcc/cp/cp-objcp-common.cc
@@ -110,7 +110,6 @@ static constexpr cp_feature_info cp_feature_table[] =
   { "cxx_alignof", cxx11 },
   { "cxx_attributes", cxx11 },
   { "cxx_constexpr", cxx11 },
-  { "cxx_constexpr_string_builtins", cxx11 },
   { "cxx_decltype", cxx11 },
   { "cxx_decltype_incomplete_return_types", cxx11 },
   { "cxx_default_function_template_args", cxx11 },
diff --git a/gcc/testsuite/g++.dg/ext/has-feature2.C b/gcc/testsuite/g++.dg/ext/has-feature2.C
new file mode 100644
index 00000000000..5f62916badf
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/has-feature2.C
@@ -0,0 +1,14 @@
+// { dg-do compile }
+// { dg-options "" }
+
+// PR c++/113658: we shouldn't declare support for
+// cxx_constexpr_string_builtins as GCC is missing some of the builtins
+// that clang implements.
+
+#if __has_feature (cxx_constexpr_string_builtins)
+#error
+#endif
+
+#if __has_extension (cxx_constexpr_string_builtins)
+#error
+#endif