diff --git a/Source/OpenTK/Platform/X11/Bindings/XI.cs b/Source/OpenTK/Platform/X11/Bindings/XI.cs
index 7a4329c6..6ccfb698 100644
--- a/Source/OpenTK/Platform/X11/Bindings/XI.cs
+++ b/Source/OpenTK/Platform/X11/Bindings/XI.cs
@@ -136,4 +136,10 @@ namespace OpenTK.Platform.X11
         SlaveKeyboard = 4,
         FloatingSlave = 5,
     }
+
+    enum XIMode
+    {
+        Relative = 0,
+        Absolute = 1
+    }
 }
diff --git a/Source/OpenTK/Platform/X11/Structs.cs b/Source/OpenTK/Platform/X11/Structs.cs
index bc2c9adc..38345365 100644
--- a/Source/OpenTK/Platform/X11/Structs.cs
+++ b/Source/OpenTK/Platform/X11/Structs.cs
@@ -1732,7 +1732,7 @@ namespace OpenTK.Platform.X11
         public double max;
         public double value;
         public int resolution;
-        public int mode;
+        public XIMode mode;
     }
 
     struct XIDeviceEvent