diff --git a/samples/Cpp/TestCpp/Classes/ClippingNodeTest/ClippingNodeTest.cpp b/samples/Cpp/TestCpp/Classes/ClippingNodeTest/ClippingNodeTest.cpp
index dc709aaeca..5b3bda69e9 100644
--- a/samples/Cpp/TestCpp/Classes/ClippingNodeTest/ClippingNodeTest.cpp
+++ b/samples/Cpp/TestCpp/Classes/ClippingNodeTest/ClippingNodeTest.cpp
@@ -663,8 +663,7 @@ void RawStencilBufferTest::setupStencilForClippingOnPlane(GLint plane)
 void RawStencilBufferTest::setupStencilForDrawingOnPlane(GLint plane)
 {
     GLint planeMask = 0x1 << plane;
-    GLint equalOrLessPlanesMask = planeMask | (planeMask - 1);
-    glStencilFunc(GL_EQUAL, equalOrLessPlanesMask, equalOrLessPlanesMask);
+    glStencilFunc(GL_EQUAL, planeMask, planeMask);
     glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 }