diff --git a/src/OpenMesh/Core/IO/writer/STLWriter.cc b/src/OpenMesh/Core/IO/writer/STLWriter.cc
index b2be7ab9..c3d81434 100644
--- a/src/OpenMesh/Core/IO/writer/STLWriter.cc
+++ b/src/OpenMesh/Core/IO/writer/STLWriter.cc
@@ -121,6 +121,7 @@ _STLWriter_::
 write(std::ostream& _os, BaseExporter& _be, Options _opt) const
 {
   omerr() << "[STLWriter] : STL Streams are not supported " << std::endl;
+  return false;
 }