diff --git a/src/passes/GenerateDynCalls.cpp b/src/passes/GenerateDynCalls.cpp
index c2d829530db..818bfa967ea 100644
--- a/src/passes/GenerateDynCalls.cpp
+++ b/src/passes/GenerateDynCalls.cpp
@@ -149,6 +149,7 @@ void GenerateDynCalls::generateDynCallThunk(HeapType funcType) {
   }
   auto f = builder.makeFunction(
     name, std::move(namedParams), Signature(Type(params), sig.results), {});
+  f->hasExplicitName = true;
   Expression* fptr = builder.makeLocalGet(0, Type::i32);
   std::vector<Expression*> args;
   Index i = 0;
diff --git a/src/passes/LegalizeJSInterface.cpp b/src/passes/LegalizeJSInterface.cpp
index 24d76ab09c4..a0b526a811e 100644
--- a/src/passes/LegalizeJSInterface.cpp
+++ b/src/passes/LegalizeJSInterface.cpp
@@ -229,6 +229,7 @@ struct LegalizeJSInterface : public Pass {
     Builder builder(*module);
     auto* legal = new Function();
     legal->name = legalName;
+    legal->hasExplicitName = true;
 
     auto* call = module->allocator.alloc<Call>();
     call->target = func->name;