diff --git a/doc/includes/references.h b/doc/includes/references.h
index 199599f4..fe917ab1 100644
--- a/doc/includes/references.h
+++ b/doc/includes/references.h
@@ -2003,7 +2003,6 @@ typedef struct mjsMesh_ {          // mesh specification
   mjFloatVec* usernormal;          // user normal data
   mjFloatVec* usertexcoord;        // user texcoord data
   mjIntVec* userface;              // user vertex indices
-  mjIntVec* userfacenormal;        // user normal indices
   mjIntVec* userfacetexcoord;      // user texcoord indices
   mjsPlugin plugin;                // sdf plugin
   mjString* info;                  // message appended to compiler errors
diff --git a/include/mujoco/mjspec.h b/include/mujoco/mjspec.h
index 2dc3177b..eddcf222 100644
--- a/include/mujoco/mjspec.h
+++ b/include/mujoco/mjspec.h
@@ -464,7 +464,6 @@ typedef struct mjsMesh_ {          // mesh specification
   mjFloatVec* usernormal;          // user normal data
   mjFloatVec* usertexcoord;        // user texcoord data
   mjIntVec* userface;              // user vertex indices
-  mjIntVec* userfacenormal;        // user normal indices
   mjIntVec* userfacetexcoord;      // user texcoord indices
   mjsPlugin plugin;                // sdf plugin
   mjString* info;                  // message appended to compiler errors
diff --git a/introspect/structs.py b/introspect/structs.py
index 9b8c4c47..c1e00a86 100644
--- a/introspect/structs.py
+++ b/introspect/structs.py
@@ -10341,13 +10341,6 @@ STRUCTS: Mapping[str, StructDecl] = dict([
                  ),
                  doc='user vertex indices',
              ),
-             StructFieldDecl(
-                 name='userfacenormal',
-                 type=PointerType(
-                     inner_type=ValueType(name='mjIntVec'),
-                 ),
-                 doc='user normal indices',
-             ),
              StructFieldDecl(
                  name='userfacetexcoord',
                  type=PointerType(