diff --git a/Source/Bind/Specifications/GL2/enumext.spec b/Source/Bind/Specifications/GL2/enumext.spec
index acc73255..d9dc5837 100644
--- a/Source/Bind/Specifications/GL2/enumext.spec
+++ b/Source/Bind/Specifications/GL2/enumext.spec
@@ -7556,6 +7556,24 @@ SizedInternalFormat enum:
 	use PixelInternalFormat RGBA8UI
 	use PixelInternalFormat RGBA16UI
 	use PixelInternalFormat RGBA32UI
+	
+TextureTarget enum:
+	TEXTURE_RECTANGLE               = 0x84F5    # ARB_texture_rectangle
+    PROXY_TEXTURE_RECTANGLE             = 0x84F7    # ARB_texture_rectangle
+    
+GetPName enum:
+    TEXTURE_BINDING_RECTANGLE           = 0x84F6    # ARB_texture_rectangle
+    MAX_RECTANGLE_TEXTURE_SIZE          = 0x84F8    # ARB_texture_rectangle
+
+ActiveUniformType enum:
+	SAMPLER_2D_RECT                 = 0x8B63    # ARB_shader_objects + ARB_texture_rectangle
+    SAMPLER_2D_RECT_SHADOW              = 0x8B64    # ARB_shader_objects + ARB_texture_rectangle
+    SAMPLER_BUFFER                  = 0x8DC2    # EXT_gpu_shader4 + ARB_texture_buffer_object
+    INT_SAMPLER_2D_RECT             = 0x8DCD    # EXT_gpu_shader4 + ARB_texture_rectangle
+    INT_SAMPLER_BUFFER              = 0x8DD0    # EXT_gpu_shader4 + ARB_texture_buffer_object
+    UNSIGNED_INT_SAMPLER_2D_RECT            = 0x8DD5    # EXT_gpu_shader4 + ARB_texture_rectangle
+    UNSIGNED_INT_SAMPLER_BUFFER         = 0x8DD8    # EXT_gpu_shader4 + ARB_texture_buffer_object
+	
 
 # Non-core 
 
diff --git a/Source/OpenTK/Graphics/OpenGL/GLEnums.cs b/Source/OpenTK/Graphics/OpenGL/GLEnums.cs
index 79d48f6c..a1411370 100644
--- a/Source/OpenTK/Graphics/OpenGL/GLEnums.cs
+++ b/Source/OpenTK/Graphics/OpenGL/GLEnums.cs
@@ -74,6 +74,8 @@ namespace OpenTK.Graphics.OpenGL
         SamplerCube = ((int)0x8B60),
         Sampler1DShadow = ((int)0x8B61),
         Sampler2DShadow = ((int)0x8B62),
+        Sampler2DRect = ((int)0x8B63),
+        Sampler2DRectShadow = ((int)0x8B64),
         FloatMat2x3 = ((int)0x8B65),
         FloatMat2x4 = ((int)0x8B66),
         FloatMat3x2 = ((int)0x8B67),
@@ -82,6 +84,7 @@ namespace OpenTK.Graphics.OpenGL
         FloatMat4x3 = ((int)0x8B6A),
         Sampler1DArray = ((int)0x8DC0),
         Sampler2DArray = ((int)0x8DC1),
+        SamplerBuffer = ((int)0x8DC2),
         Sampler1DArrayShadow = ((int)0x8DC3),
         Sampler2DArrayShadow = ((int)0x8DC4),
         SamplerCubeShadow = ((int)0x8DC5),
@@ -92,14 +95,18 @@ namespace OpenTK.Graphics.OpenGL
         IntSampler2D = ((int)0x8DCA),
         IntSampler3D = ((int)0x8DCB),
         IntSamplerCube = ((int)0x8DCC),
+        IntSampler2DRect = ((int)0x8DCD),
         IntSampler1DArray = ((int)0x8DCE),
         IntSampler2DArray = ((int)0x8DCF),
+        IntSamplerBuffer = ((int)0x8DD0),
         UnsignedIntSampler1D = ((int)0x8DD1),
         UnsignedIntSampler2D = ((int)0x8DD2),
         UnsignedIntSampler3D = ((int)0x8DD3),
         UnsignedIntSamplerCube = ((int)0x8DD4),
+        UnsignedIntSampler2DRect = ((int)0x8DD5),
         UnsignedIntSampler1DArray = ((int)0x8DD6),
         UnsignedIntSampler2DArray = ((int)0x8DD7),
+        UnsignedIntSamplerBuffer = ((int)0x8DD8),
         Sampler2DMultisample = ((int)0x9108),
         IntSampler2DMultisample = ((int)0x9109),
         UnsignedIntSampler2DMultisample = ((int)0x910A),
@@ -7569,6 +7576,8 @@ namespace OpenTK.Graphics.OpenGL
         MaxRenderbufferSize = ((int)0x84E8),
         MaxRenderbufferSizeExt = ((int)0x84E8),
         TextureCompressionHint = ((int)0x84EF),
+        TextureBindingRectangle = ((int)0x84F6),
+        MaxRectangleTextureSize = ((int)0x84F8),
         MaxTextureLodBias = ((int)0x84FD),
         TextureCubeMap = ((int)0x8513),
         TextureBindingCubeMap = ((int)0x8514),
@@ -10443,8 +10452,10 @@ namespace OpenTK.Graphics.OpenGL
         TextureMaxLod = ((int)0x813B),
         TextureBaseLevel = ((int)0x813C),
         TextureMaxLevel = ((int)0x813D),
+        TextureRectangle = ((int)0x84F5),
         TextureRectangleArb = ((int)0x84F5),
         TextureRectangleNv = ((int)0x84F5),
+        ProxyTextureRectangle = ((int)0x84F7),
         TextureCubeMap = ((int)0x8513),
         TextureBindingCubeMap = ((int)0x8514),
         TextureCubeMapPositiveX = ((int)0x8515),