diff --git a/src/java/org/web3d/vrml/renderer/ogl/OGLVRMLSceneBuilder.java b/src/java/org/web3d/vrml/renderer/ogl/OGLVRMLSceneBuilder.java
index 4eec26a9fa485552a3878b939b2dd7124e3a6502..24824c84a4b8df475a6595fb3ce117292e33d2d1 100644
--- a/src/java/org/web3d/vrml/renderer/ogl/OGLVRMLSceneBuilder.java
+++ b/src/java/org/web3d/vrml/renderer/ogl/OGLVRMLSceneBuilder.java
@@ -333,17 +333,17 @@ public class OGLVRMLSceneBuilder implements SceneBuilder {
             // we're in VRML model either 97 or 1.0.
             // Look at the 6th character to see the version number
             // ie "VRML V1.0" or "VRML V2.0"
-            boolean is_20 = (version.charAt(1) == '2');
-            boolean is_30 = (version.charAt(1) == '3');
-            boolean is_40 = (version.charAt(1) == '4');
+            boolean isVersion2 = (version.charAt(1) == '2');
+            boolean isVersion3 = (version.charAt(1) == '3');
+            boolean isVersion4 = (version.charAt(1) == '4');
 
-            if      (is_20)  
+            if      (isVersion2)  
                  major = 2;
-            else if (is_30) 
+            else if (isVersion3) 
                  major = 3;
-            else if (is_40) 
+            else if (isVersion4) 
                  major = 4;
-            else System.err.println ("OGLVRMLSceneBuilder, incorrect VRML major version number " + version);
+            else System.err.println ("[OGLVRMLSceneBuilder] incorrect VRML major version number " + version);
         } 
         else // X3D XML encoding
         {