diff --git a/src/renderers/webgl/WebGLCapabilities.d.ts b/src/renderers/webgl/WebGLCapabilities.d.ts
index 37a3085696d4143b900d6f55436da199d57960ee..306a452dc7b073f66ca4e621b6780361ec205287 100644
--- a/src/renderers/webgl/WebGLCapabilities.d.ts
+++ b/src/renderers/webgl/WebGLCapabilities.d.ts
@@ -11,6 +11,7 @@ export class WebGLCapabilities {
 		parameters: WebGLCapabilitiesParameters
 	);
 
+	isWebGL2: boolean;
 	precision: any;
 	logarithmicDepthBuffer: any;
 	maxTextures: any;