diff --git a/Fwk/VizFwk/LibCore/cvfVector4.inl b/Fwk/VizFwk/LibCore/cvfVector4.inl
index 5c0bd9269a..2fee54a83c 100644
--- a/Fwk/VizFwk/LibCore/cvfVector4.inl
+++ b/Fwk/VizFwk/LibCore/cvfVector4.inl
@@ -491,7 +491,7 @@ inline void Vector4<S>::setZero()
 template<typename S>
 inline bool Vector4<S>::isZero() const
 {
-    return (m_v[0] == 0) && (m_v[1] == 0) && (m_v[2] == 0) && (m_v[2] == 0);
+    return (m_v[0] == 0) && (m_v[1] == 0) && (m_v[2] == 0) && (m_v[3] == 0);
 }