diff --git a/src/parser.y b/src/parser.y
index 68d9e2c12..a06db79c4 100644
--- a/src/parser.y
+++ b/src/parser.y
@@ -765,7 +765,7 @@ algebra: algebra_head '{' fn_defs '}'
 automatic_specifier:
         @enum@ |
         @count@ |
-	@enum_graph@
+        @trees@
         ;
 \end{lstlisting}
 The {\tt automatic} keyword specifies the auto generation of the
diff --git a/src/signature.cc b/src/signature.cc
index 773292610..da85199b2 100644
--- a/src/signature.cc
+++ b/src/signature.cc
@@ -149,8 +149,8 @@ Algebra *Signature::generate(std::string *n, std::string *mode) {
     return generate_count(n);
   if (*mode == "enum")
     return generate_enum(n);
-  if (*mode == "enum_graph")
-    return generate_enum_graph(n);
+  if (*mode == "trees")
+    return generate_trees(n);
   return NULL;
 }
 
@@ -421,7 +421,7 @@ Algebra *Signature::generate_enum(std::string *n) {
 //------------------------------------------------------------------------------------------------------------
 
 
-struct Generate_Enum_Graph_Stmts : public Generate_Stmts {
+struct Generate_Tree_Stmts : public Generate_Stmts {
  private:
 	// closes nodes for simple tracks
   void apply(std::list<Statement::Base*> &l, Para_Decl::Simple *s,
@@ -564,9 +564,9 @@ struct Generate_Enum_Graph_Stmts : public Generate_Stmts {
 };
 
 
-Algebra *Signature::generate_enum_graph(std::string *n) {
+Algebra *Signature::generate_trees(std::string *n) {
   return generate_algebra(n, Mode::PRETTY, new Type::External("Rope"),
-		  	  	  	  	  Generate_Enum_Graph_Stmts());
+		  	  	  	  	  Generate_Tree_Stmts());
 }
 
 
diff --git a/src/signature.hh b/src/signature.hh
index 2e2f1d955..a7315c00a 100644
--- a/src/signature.hh
+++ b/src/signature.hh
@@ -97,7 +97,7 @@ class Signature : public Signature_Base {
  private:
     Algebra *generate_count(std::string *n);
     Algebra *generate_enum(std::string *n);
-    Algebra *generate_enum_graph(std::string *n);
+    Algebra *generate_trees(std::string *n);
     Algebra *generate_algebra(
       std::string *n, Mode::Type mode_type, Type::Base *answer_type,
       Type::Base *alph, const Generate_Stmts &generate_stmts);