diff --git a/src/func.c b/src/func.c
index 93654fd65bc0..da4382ec93a6 100644
--- a/src/func.c
+++ b/src/func.c
@@ -1467,6 +1467,12 @@ void FuncDeclaration::semantic3(Scope *sc)
                 }
                 if (inv)
                 {
+                #if 1
+                    // Workaround for bugzilla 13394: For the correct mangling,
+                    // run attribute inference on inv if needed.
+                    inv->functionSemantic();
+                #endif
+
                     //e = new DsymbolExp(Loc(), inv);
                     //e = new CallExp(Loc(), e);
                     //e = e->semantic(sc2);
@@ -1485,6 +1491,13 @@ void FuncDeclaration::semantic3(Scope *sc)
             }
             else
             {
+            #if 1
+                // Workaround for bugzilla 13394: For the correct mangling,
+                // run attribute inference on inv if needed.
+                if (ad->isStructDeclaration() && ad->inv)
+                    ad->inv->functionSemantic();
+            #endif
+
                 // Call invariant virtually
                 Expression *v = new ThisExp(Loc());
                 v->type = vthis->type;
@@ -1519,6 +1532,12 @@ void FuncDeclaration::semantic3(Scope *sc)
                 }
                 if (inv)
                 {
+                #if 1
+                    // Workaround for bugzilla 13394: For the correct mangling,
+                    // run attribute inference on inv if needed.
+                    inv->functionSemantic();
+                #endif
+
                     //e = new DsymbolExp(Loc(), inv);
                     //e = new CallExp(Loc(), e);
                     //e = e->semantic(sc2);
@@ -1536,6 +1555,13 @@ void FuncDeclaration::semantic3(Scope *sc)
             }
             else
             {
+            #if 1
+                // Workaround for bugzilla 13394: For the correct mangling,
+                // run attribute inference on inv if needed.
+                if (ad->isStructDeclaration() && ad->inv)
+                    ad->inv->functionSemantic();
+            #endif
+
                 // Call invariant virtually
                 Expression *v = new ThisExp(Loc());
                 v->type = vthis->type;
diff --git a/test/runnable/imports/link13394a.d b/test/runnable/imports/link13394a.d
new file mode 100644
index 000000000000..57b4422a8f6d
--- /dev/null
+++ b/test/runnable/imports/link13394a.d
@@ -0,0 +1,24 @@
+module imports.link13394a;
+
+class A
+{
+    this() { }
+}
+
+class Btpl(T) : T
+{
+    this()() { }
+
+    invariant() {}
+}
+
+alias B = Btpl!A;
+
+struct Stpl()
+{
+    void func()() {}
+
+    invariant() {}
+}
+
+alias S = Stpl!();
diff --git a/test/runnable/link13394.d b/test/runnable/link13394.d
new file mode 100644
index 000000000000..aea86862a659
--- /dev/null
+++ b/test/runnable/link13394.d
@@ -0,0 +1,13 @@
+// COMPILE_SEPARATELY
+// EXTRA_SOURCES: imports/link13394a.d
+
+module link13394;
+import imports.link13394a;
+
+void main()
+{
+    auto b = new B();
+
+    auto s = S();
+    s.func();
+}