diff --git a/gcc/tree.def b/gcc/tree.def
index 44e5a5e..30fd766 100644
--- a/gcc/tree.def
+++ b/gcc/tree.def
@@ -1407,6 +1407,13 @@ DEFTREECODE (CILK_SPAWN_STMT, "cilk_spawn_stmt", tcc_statement, 1)
 /* Cilk Sync statement: Does not have any operands.  */
 DEFTREECODE (CILK_SYNC_STMT, "cilk_sync_stmt", tcc_statement, 0)
 
+/* Wrapper to add a source code location to an expression, either one
+   that doesn't have one (such as an INTEGER_CST), or to a usage of a
+   variable (e.g. PARAM_DECL or VAR_DECL), where we want to record
+   the site in the source where the variable was *used* rather than
+   where it was declared.  */
+DEFTREECODE (LOCATION_EXPR, "location_expr", tcc_unary, 1)
+
 /*
 Local variables:
 mode:c