diff --git a/mappings/net/minecraft/client/GlExtensionHandler.mapping b/mappings/net/minecraft/client/GlExtensionHandler.mapping
index 62f73686e6..1fda6c8bf3 100644
--- a/mappings/net/minecraft/client/GlExtensionHandler.mapping
+++ b/mappings/net/minecraft/client/GlExtensionHandler.mapping
@@ -17,6 +17,7 @@ CLASS none/cbf net/minecraft/client/GlExtensionHandler
 	FIELD L GL_OPERAND2_ALPHA I
 	FIELD M extVersionBlendFuncSeparate Z
 	FIELD N hasGL21 Z
+	FIELD O canUseShaders Z
 	FIELD P hasVertexBufferObject Z
 	FIELD R GL_ARRAY_BUFFER I
 	FIELD S GL_STATIC_DRAW I
@@ -68,6 +69,8 @@ CLASS none/cbf net/minecraft/client/GlExtensionHandler
 	METHOD a uniform1fv (ILjava/nio/FloatBuffer;)V
 	METHOD a uniform1iv (ILjava/nio/IntBuffer;)V
 	METHOD a uniformMatrix2fv (IZLjava/nio/FloatBuffer;)V
+	METHOD a shellExecute (Ljava/io/File;)V
+	METHOD b canUseShaders ()Z
 	METHOD b createShader (I)I
 	METHOD b attachShader (II)V
 	METHOD b framebufferRenderbuffer (IIII)V
@@ -106,3 +109,4 @@ CLASS none/cbf net/minecraft/client/GlExtensionHandler
 	METHOD k getCpuInfoString ()Ljava/lang/String;
 	METHOD k activeTexture (I)V
 	METHOD l clientActiveTexture (I)V
+	METHOD m drawAxes3D (I)V