diff --git a/gcc/cp/call.cc b/gcc/cp/call.cc
index 85536fc25ff..7bbc1fb0c78 100644
--- a/gcc/cp/call.cc
+++ b/gcc/cp/call.cc
@@ -13490,7 +13490,8 @@ tourney (struct z_candidate *candidates, tsubst_flags_t complain)
 	{
 	  previous_worse_champ = nullptr;
 	  champ = &(*challenger)->next;
-	  if (!*champ || !(*champ)->viable)
+	  if (!*champ || !(*champ)->viable
+	      || (*champ)->viable < (*challenger)->viable)
 	    {
 	      champ = nullptr;
 	      break;
diff --git a/gcc/testsuite/g++.dg/overload/error7.C b/gcc/testsuite/g++.dg/overload/error7.C
new file mode 100644
index 00000000000..de50ce5f66e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/overload/error7.C
@@ -0,0 +1,10 @@
+// PR c++/115239
+
+bool foo(char *, long);     // #1, strictly viable, ambig with #2
+bool foo(char *, unsigned); // #2, strictly viable, ambig with #1
+bool foo(char, long);       // #3, non-strictly viable
+bool foo(char, unsigned);   // #4, non-strictly viable
+
+int main() {
+  foo((char *)0, 0); // { dg-error "ambiguous" }
+}