diff --git a/Sources/Rendering/OpenGL/PolyDataMapper/index.js b/Sources/Rendering/OpenGL/PolyDataMapper/index.js
index 3a2fb56b6d5..f1d88ee209a 100644
--- a/Sources/Rendering/OpenGL/PolyDataMapper/index.js
+++ b/Sources/Rendering/OpenGL/PolyDataMapper/index.js
@@ -625,7 +625,7 @@ function vtkOpenGLPolyDataMapper(publicAPI, model) {
           `  gl_PointSize = ${actor
             .getProperty()
             .getPointSize()
-            .toFixed(1)};`,
+            }.0;`,
         ],
         false
       ).result;