diff --git a/src/osgPlugins/stl/ReaderWriterSTL.cpp b/src/osgPlugins/stl/ReaderWriterSTL.cpp
index d27048ce2..608f82cd0 100644
--- a/src/osgPlugins/stl/ReaderWriterSTL.cpp
+++ b/src/osgPlugins/stl/ReaderWriterSTL.cpp
@@ -293,6 +293,7 @@ private:
             else
                 *m_f << "solid " << node.getName() << std::endl;
 
+            *m_f << std::fixed << std::setprecision(7);
             for (unsigned int i = 0; i < node.getNumDrawables(); ++i)
             {
                 osg::TriangleFunctor<PushPoints> tf;