diff --git a/doc/opengl-support.dox b/doc/opengl-support.dox
index 81cc932ed..c4a3ff25f 100644
--- a/doc/opengl-support.dox
+++ b/doc/opengl-support.dox
@@ -257,6 +257,7 @@ Extension                                   | Status
 
 Extension                                   | Status
 ------------------------------------------- | ------
+@extension{AMD,transform_feedback3_lines_triangles} | done (nothing to do)
 @extension{AMD,vertex_shader_layer}         | done (shading language only)
 @extension{AMD,shader_trinary_minmax}       | done (shading language only)
 @extension{ATI,texture_mirror_once}         | done (GL 4.4 subset)
diff --git a/src/Magnum/Context.cpp b/src/Magnum/Context.cpp
index 2d29ce0de..c1294da14 100644
--- a/src/Magnum/Context.cpp
+++ b/src/Magnum/Context.cpp
@@ -65,6 +65,7 @@ const std::vector<Extension>& Extension::extensions(Version version) {
     static const std::vector<Extension> empty;
     #ifndef MAGNUM_TARGET_GLES
     static const std::vector<Extension> extensions{
+        _extension(GL,AMD,transform_feedback3_lines_triangles),
         _extension(GL,AMD,vertex_shader_layer),
         _extension(GL,AMD,shader_trinary_minmax),
         _extension(GL,ARB,robustness),
diff --git a/src/Magnum/Extensions.h b/src/Magnum/Extensions.h
index c674846c8..71328fd4e 100644
--- a/src/Magnum/Extensions.h
+++ b/src/Magnum/Extensions.h
@@ -80,6 +80,7 @@ namespace GL {
     #ifndef MAGNUM_TARGET_GLES
     #line 1
     namespace AMD {
+        _extension(GL,AMD,transform_feedback3_lines_triangles, GL210, None) // #397
         _extension(GL,AMD,vertex_shader_layer,          GL210,  None) // #417
         _extension(GL,AMD,shader_trinary_minmax,        GL210,  None) // #428
     } namespace ARB {