diff --git a/gcc/testsuite/g++.old-deja/g++.pt/explicit75.C b/gcc/testsuite/g++.old-deja/g++.pt/explicit75.C
new file mode 100644
index 000000000000..433f0b193e39
--- /dev/null
+++ b/gcc/testsuite/g++.old-deja/g++.pt/explicit75.C
@@ -0,0 +1,11 @@
+// Test for not complaining about mismatches during unification.
+// Build don't link:
+
+template <void (*F)(int)> void f();
+template <void (*F)(double)> void f();
+extern void g(double);
+
+void h ()
+{
+  f<g>();
+}