diff --git a/include/xo/parser/parser.hpp b/include/xo/parser/parser.hpp
index deafa708..ebf2f7d6 100644
--- a/include/xo/parser/parser.hpp
+++ b/include/xo/parser/parser.hpp
@@ -97,6 +97,7 @@ namespace xo {
             return os;
         }
 
+#ifdef OBSOLETE
         enum class expractiontype {
             invalid = -1,
 
@@ -149,6 +150,7 @@ namespace xo {
             x.print(os);
             return os;
         }
+#endif
 
         class exprstatestack;
 
diff --git a/src/parser/parser.cpp b/src/parser/parser.cpp
index 0fbe7946..6813ba8e 100644
--- a/src/parser/parser.cpp
+++ b/src/parser/parser.cpp
@@ -76,6 +76,7 @@ namespace xo {
             return "???";
         }
 
+#ifdef OBSOLETE
         const char *
         expractiontype_descr(expractiontype x) {
             switch(x) {
@@ -101,6 +102,7 @@ namespace xo {
             os << xtag("type", action_type_);
             os << ">";
         }
+#endif
 
         bool
         exprstate::admits_definition() const {