diff --git a/Source/OpenTK/Graphics/ES20/Helper.cs b/Source/OpenTK/Graphics/ES20/Helper.cs
index cf0556be..2c995675 100644
--- a/Source/OpenTK/Graphics/ES20/Helper.cs
+++ b/Source/OpenTK/Graphics/ES20/Helper.cs
@@ -437,7 +437,7 @@ namespace OpenTK.Graphics.ES20
         {
             GL.Viewport(rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height);
         }
-#if NO_SYSDRAWING
+#if MINIMAL
         public static void Viewport(OpenTK.Point location, OpenTK.Size size)
         {
             GL.Viewport(location.X, location.Y, size.Width, size.Height);
diff --git a/Source/OpenTK/Graphics/ES30/Helper.cs b/Source/OpenTK/Graphics/ES30/Helper.cs
index 9a289b84..d1364e7b 100644
--- a/Source/OpenTK/Graphics/ES30/Helper.cs
+++ b/Source/OpenTK/Graphics/ES30/Helper.cs
@@ -428,7 +428,7 @@ namespace OpenTK.Graphics.ES30
         {
             GL.Viewport(rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height);
         }
-#if NO_SYSDRAWING
+#if MINIMAL
         public static void Viewport(OpenTK.Point location, OpenTK.Size size)
         {
             GL.Viewport(location.X, location.Y, size.Width, size.Height);
diff --git a/Source/OpenTK/Graphics/OpenGL/GLHelper.cs b/Source/OpenTK/Graphics/OpenGL/GLHelper.cs
index db3815c3..98b1235e 100644
--- a/Source/OpenTK/Graphics/OpenGL/GLHelper.cs
+++ b/Source/OpenTK/Graphics/OpenGL/GLHelper.cs
@@ -1101,7 +1101,7 @@ namespace OpenTK.Graphics.OpenGL
         {
             GL.Viewport(rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height);
         }
-#if NO_SYSDRAWING
+#if MINIMAL
         public static void Viewport(OpenTK.Point location, OpenTK.Size size)
         {
             GL.Viewport(location.X, location.Y, size.Width, size.Height);
diff --git a/Source/OpenTK/Graphics/OpenGL4/Helper.cs b/Source/OpenTK/Graphics/OpenGL4/Helper.cs
index bb2c2540..8a8ca1cb 100644
--- a/Source/OpenTK/Graphics/OpenGL4/Helper.cs
+++ b/Source/OpenTK/Graphics/OpenGL4/Helper.cs
@@ -437,7 +437,7 @@ namespace OpenTK.Graphics.OpenGL4
         {
             GL.Viewport(rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height);
         }
-#if NO_SYSDRAWING
+#if MINIMAL
         public static void Viewport(OpenTK.Point location, OpenTK.Size size)
         {
             GL.Viewport(location.X, location.Y, size.Width, size.Height);
diff --git a/Source/OpenTK/Math/Point.cs b/Source/OpenTK/Math/Point.cs
index 67613933..3fad9e1e 100644
--- a/Source/OpenTK/Math/Point.cs
+++ b/Source/OpenTK/Math/Point.cs
@@ -31,7 +31,7 @@ using System.Text;
 
 namespace OpenTK
 {
-#if NO_SYSDRAWING
+#if MINIMAL
     /// <summary>
     /// Defines a point on a two-dimensional plane.
     /// </summary>
diff --git a/Source/OpenTK/Math/Rectangle.cs b/Source/OpenTK/Math/Rectangle.cs
index 0b3a28dd..b414b535 100644
--- a/Source/OpenTK/Math/Rectangle.cs
+++ b/Source/OpenTK/Math/Rectangle.cs
@@ -31,7 +31,7 @@ using System.Text;
 
 namespace OpenTK
 {
-#if NO_SYSDRAWING
+#if MINIMAL
     /// <summary>
     /// Represents a rectangular region on a two-dimensional plane.
     /// </summary>
diff --git a/Source/OpenTK/Math/Size.cs b/Source/OpenTK/Math/Size.cs
index baadb4bc..5b0ef87f 100644
--- a/Source/OpenTK/Math/Size.cs
+++ b/Source/OpenTK/Math/Size.cs
@@ -31,7 +31,7 @@ using System.Text;
 
 namespace OpenTK
 {
-#if NO_SYSDRAWING
+#if MINIMAL
     /// <summary>
     /// Stores the width and height of a rectangle.
     /// </summary>