diff --git a/flang/include/flang/Semantics/symbol.h b/flang/include/flang/Semantics/symbol.h
--- a/flang/include/flang/Semantics/symbol.h
+++ b/flang/include/flang/Semantics/symbol.h
@@ -259,7 +259,7 @@
   void add_paramDecl(const Symbol &symbol) { paramDecls_.push_back(symbol); }
   void add_component(const Symbol &);
   void set_sequence(bool x = true) { sequence_ = x; }
-  void set_isForwardReferenced() { isForwardReferenced_ = true; }
+  void set_isForwardReferenced(bool value) { isForwardReferenced_ = value; }
   const std::list<SourceName> &componentNames() const {
     return componentNames_;
   }
diff --git a/flang/lib/Semantics/check-declarations.cpp b/flang/lib/Semantics/check-declarations.cpp
--- a/flang/lib/Semantics/check-declarations.cpp
+++ b/flang/lib/Semantics/check-declarations.cpp
@@ -845,6 +845,10 @@
 
 void CheckHelper::CheckDerivedType(
     const Symbol &derivedType, const DerivedTypeDetails &details) {
+  if (details.isForwardReferenced() && !context_.HasError(derivedType)) {
+    messages_.Say("The derived type '%s' has not been defined"_err_en_US,
+        derivedType.name());
+  }
   const Scope *scope{derivedType.scope()};
   if (!scope) {
     CHECK(details.isForwardReferenced());
diff --git a/flang/lib/Semantics/resolve-names.cpp b/flang/lib/Semantics/resolve-names.cpp
--- a/flang/lib/Semantics/resolve-names.cpp
+++ b/flang/lib/Semantics/resolve-names.cpp
@@ -3957,6 +3957,7 @@
   CHECK(scope.symbol());
   CHECK(scope.symbol()->scope() == &scope);
   auto &details{scope.symbol()->get<DerivedTypeDetails>()};
+  details.set_isForwardReferenced(false);
   std::set<SourceName> paramNames;
   for (auto &paramName : std::get<std::list<parser::Name>>(stmt.statement.t)) {
     details.add_paramName(paramName.source);
@@ -5027,7 +5028,7 @@
         Resolve(name, *symbol);
       };
       DerivedTypeDetails details;
-      details.set_isForwardReferenced();
+      details.set_isForwardReferenced(true);
       symbol->set_details(std::move(details));
     } else { // C732
       Say(name, "Derived type '%s' not found"_err_en_US);
diff --git a/flang/lib/Semantics/type.cpp b/flang/lib/Semantics/type.cpp
--- a/flang/lib/Semantics/type.cpp
+++ b/flang/lib/Semantics/type.cpp
@@ -244,6 +244,7 @@
     foldingContext.messages().Say(typeSymbol_.name(),
         "The derived type '%s' was forward-referenced but not defined"_err_en_US,
         typeSymbol_.name());
+    context.SetError(typeSymbol_);
     return;
   }
   EvaluateParameters(context);
diff --git a/flang/test/Semantics/bad-forward-type.f90 b/flang/test/Semantics/bad-forward-type.f90
--- a/flang/test/Semantics/bad-forward-type.f90
+++ b/flang/test/Semantics/bad-forward-type.f90
@@ -90,3 +90,10 @@
     integer, kind :: n = 3
   end type
 end subroutine s9
+
+subroutine s10
+  type t
+    !ERROR: The derived type 'undef' has not been defined
+    type(undef), pointer :: y
+  end type
+end subroutine s10