diff --git a/examples/jsm/exporters/GLTFExporter.js b/examples/jsm/exporters/GLTFExporter.js
index 4257b411855a64..52cc3c1c82ccf0 100644
--- a/examples/jsm/exporters/GLTFExporter.js
+++ b/examples/jsm/exporters/GLTFExporter.js
@@ -2837,7 +2837,12 @@ class GLTFMaterialsVolumeExtension {
 
 		}
 
-		extensionDef.attenuationDistance = material.attenuationDistance;
+		if ( material.attenuationDistance !== Infinity ) {
+
+			extensionDef.attenuationDistance = material.attenuationDistance;
+
+		}
+
 		extensionDef.attenuationColor = material.attenuationColor.toArray();
 
 		materialDef.extensions = materialDef.extensions || {};