diff --git a/Source/Compatibility/Math/Vector4.cs b/Source/Compatibility/Math/Vector4.cs
index 2810581f..bdcb52ec 100644
--- a/Source/Compatibility/Math/Vector4.cs
+++ b/Source/Compatibility/Math/Vector4.cs
@@ -104,7 +104,7 @@ namespace OpenTK.Math
         /// <param name="x">The x component of the Vector4.</param>
         /// <param name="y">The y component of the Vector4.</param>
         /// <param name="z">The z component of the Vector4.</param>
-        /// <param name="w">The z component of the Vector4.</param>
+        /// <param name="w">The w component of the Vector4.</param>
         public Vector4(float x, float y, float z, float w)
         {
             X = x;
@@ -138,10 +138,10 @@ namespace OpenTK.Math
         }
 
         /// <summary>
-        /// Constructs a new Vector4 from the specified Vector3 and W component.
+        /// Constructs a new Vector4 from the specified Vector3 and w component.
         /// </summary>
         /// <param name="v">The Vector3 to copy components from.</param>
-        /// <param name="w">The W component of the new Vector4.</param>
+        /// <param name="w">The w component of the new Vector4.</param>
         public Vector4(Vector3 v, float w)
         {
             X = v.X;
diff --git a/Source/Compatibility/Math/Vector4d.cs b/Source/Compatibility/Math/Vector4d.cs
index cdd0bf9d..301936d6 100644
--- a/Source/Compatibility/Math/Vector4d.cs
+++ b/Source/Compatibility/Math/Vector4d.cs
@@ -101,7 +101,7 @@ namespace OpenTK.Math
         /// <param name="x">The x component of the Vector4d.</param>
         /// <param name="y">The y component of the Vector4d.</param>
         /// <param name="z">The z component of the Vector4d.</param>
-        /// <param name="w">The z component of the Vector4d.</param>
+        /// <param name="w">The w component of the Vector4d.</param>
         public Vector4d(double x, double y, double z, double w)
         {
             X = x;
@@ -135,10 +135,10 @@ namespace OpenTK.Math
         }
 
         /// <summary>
-        /// Constructs a new Vector4d from the specified Vector3d and W component.
+        /// Constructs a new Vector4d from the specified Vector3d and w component.
         /// </summary>
         /// <param name="v">The Vector3d to copy components from.</param>
-        /// <param name="w">The W component of the new Vector4.</param>
+        /// <param name="w">The w component of the new Vector4.</param>
         public Vector4d(Vector3 v, double w)
         {
             X = v.X;
diff --git a/Source/OpenTK/Math/Vector4.cs b/Source/OpenTK/Math/Vector4.cs
index 9b09ee76..ccbd7d16 100644
--- a/Source/OpenTK/Math/Vector4.cs
+++ b/Source/OpenTK/Math/Vector4.cs
@@ -102,7 +102,7 @@ namespace OpenTK
         /// <param name="x">The x component of the Vector4.</param>
         /// <param name="y">The y component of the Vector4.</param>
         /// <param name="z">The z component of the Vector4.</param>
-        /// <param name="w">The z component of the Vector4.</param>
+        /// <param name="w">The w component of the Vector4.</param>
         public Vector4(float x, float y, float z, float w)
         {
             X = x;
@@ -136,10 +136,10 @@ namespace OpenTK
         }
 
         /// <summary>
-        /// Constructs a new Vector4 from the specified Vector3 and W component.
+        /// Constructs a new Vector4 from the specified Vector3 and w component.
         /// </summary>
         /// <param name="v">The Vector3 to copy components from.</param>
-        /// <param name="w">The W component of the new Vector4.</param>
+        /// <param name="w">The w component of the new Vector4.</param>
         public Vector4(Vector3 v, float w)
         {
             X = v.X;
diff --git a/Source/OpenTK/Math/Vector4d.cs b/Source/OpenTK/Math/Vector4d.cs
index 23f0e6c6..5e58f281 100644
--- a/Source/OpenTK/Math/Vector4d.cs
+++ b/Source/OpenTK/Math/Vector4d.cs
@@ -100,7 +100,7 @@ namespace OpenTK
         /// <param name="x">The x component of the Vector4d.</param>
         /// <param name="y">The y component of the Vector4d.</param>
         /// <param name="z">The z component of the Vector4d.</param>
-        /// <param name="w">The z component of the Vector4d.</param>
+        /// <param name="w">The w component of the Vector4d.</param>
         public Vector4d(double x, double y, double z, double w)
         {
             X = x;
@@ -134,10 +134,10 @@ namespace OpenTK
         }
 
         /// <summary>
-        /// Constructs a new Vector4d from the specified Vector3d and W component.
+        /// Constructs a new Vector4d from the specified Vector3d and w component.
         /// </summary>
         /// <param name="v">The Vector3d to copy components from.</param>
-        /// <param name="w">The W component of the new Vector4.</param>
+        /// <param name="w">The w component of the new Vector4.</param>
         public Vector4d(Vector3 v, double w)
         {
             X = v.X;