diff --git a/src/osgText/GlyphGeometry.cpp b/src/osgText/GlyphGeometry.cpp
index f86953dca..5a08f0672 100644
--- a/src/osgText/GlyphGeometry.cpp
+++ b/src/osgText/GlyphGeometry.cpp
@@ -486,7 +486,7 @@ public:
         }
     }
 
-    void addBoundaryToGeometry(osg::Geometry* geometry, float targetThickness, const std::string& faceName, const std::string& bevelName)
+    void addBoundaryToGeometry(osg::Geometry* geometry, float /*targetThickness*/, const std::string& faceName, const std::string& bevelName)
     {
         if (_segments.empty()) return;