diff --git a/examples/webgl_marchingcubes.html b/examples/webgl_marchingcubes.html
index 8682e5c7d5e95d8d3e11cadbf1df0ce8af7aa313..0b917af40b4c4a67d69a5cbeb03a5d0177053b00 100644
--- a/examples/webgl_marchingcubes.html
+++ b/examples/webgl_marchingcubes.html
@@ -592,7 +592,7 @@
 			if ( effectController.resolution !== resolution ) {
 
 				resolution = effectController.resolution;
-				effect.init( resolution );
+				effect.init( Math.floor( resolution ) );
 
 			}