diff --git a/vtkext/private/module/vtkF3DOpenGLGridMapper.cxx b/vtkext/private/module/vtkF3DOpenGLGridMapper.cxx
index edca068aac..f09a52e580 100644
--- a/vtkext/private/module/vtkF3DOpenGLGridMapper.cxx
+++ b/vtkext/private/module/vtkF3DOpenGLGridMapper.cxx
@@ -75,7 +75,7 @@ void vtkF3DOpenGLGridMapper::ReplaceShaderValues(
     "  float alpha = min(linewidth, 1.0);\n"
     "  float d = dist - lw;\n"
     "  return d < .0 ? alpha\n"
-    "       : d < aa ? pow((1.0 - d / aa) * alpha, 3)\n"
+    "       : d < aa ? pow((1.0 - d / aa) * alpha, 3.0)\n"
     "       : 0.0;\n"
     "}\n"
   );
diff --git a/web/f3d.wasm b/web/f3d.wasm
index a68802666d..86de3b8aa2 100644
Binary files a/web/f3d.wasm and b/web/f3d.wasm differ