diff --git a/src/renderers/WebGLRenderer.js b/src/renderers/WebGLRenderer.js
index 6e7b69d1f0260127c47b761130335edeaff36731..5d01d696ea7dc809d926fd38ab090ca790e66f01 100644
--- a/src/renderers/WebGLRenderer.js
+++ b/src/renderers/WebGLRenderer.js
@@ -951,6 +951,10 @@ function WebGLRenderer( parameters ) {
 
 					var attribute = attributes.get( geometryAttribute );
 
+					// TODO Attribute may not be available on context restore
+
+					if ( attribute === undefined ) continue;
+
 					var buffer = attribute.buffer;
 					var type = attribute.type;
 					var bytesPerElement = attribute.bytesPerElement;