diff --git a/assets/parser.c.erb b/assets/parser.c.erb
index 6bba016..7720c82 100644
--- a/assets/parser.c.erb
+++ b/assets/parser.c.erb
@@ -566,6 +566,9 @@ size_t <%= @grammar.prefix %>lex(<%= @grammar.prefix %>context_t * context, <%=
  * Parser
  *************************************************************************/
 
+/** Invalid position value. */
+#define INVALID_POSITION (<%= @grammar.prefix %>position_t){0xFFFFFFFFu, 0xFFFFFFFFu}
+
 /** Reduce ID type. */
 typedef <%= get_type_for(@parser.reduce_table.size) %> reduce_id_t;
 
diff --git a/assets/parser.h.erb b/assets/parser.h.erb
index 6b14593..df08c8a 100644
--- a/assets/parser.h.erb
+++ b/assets/parser.h.erb
@@ -52,9 +52,6 @@ typedef struct
     uint32_t col;
 } <%= @grammar.prefix %>position_t;
 
-/** Invalid position value. */
-#define INVALID_POSITION (<%= @grammar.prefix %>position_t){0xFFFFFFFFu, 0xFFFFFFFFu}
-
 /** Return whether the position is valid. */
 #define <%= @grammar.prefix %>position_valid(p) ((p).row != 0xFFFFFFFFu)