diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 7d061c807c..26cf18edb8 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2017-12-08  Sergio Durigan Junior  <sergiodj@redhat.com>
+
+	* dtrace-probe.c (dtrace_process_dof_probe): Do not declare a new
+	"expression_up" inside the TRY block.
+
 2017-12-08  Yao Qi  <yao.qi@linaro.org>
 
 	* breakpoint.c (update_watchpoint): Call
diff --git a/gdb/dtrace-probe.c b/gdb/dtrace-probe.c
index 1c88f89054..3314445f98 100644
--- a/gdb/dtrace-probe.c
+++ b/gdb/dtrace-probe.c
@@ -486,17 +486,16 @@ dtrace_process_dof_probe (struct objfile *objfile,
 
 	  TRY
 	    {
-	      expression_up expr
-		= parse_expression_with_language (type_str.c_str (),
-						  language_c);
+	      expr = parse_expression_with_language (type_str.c_str (),
+						     language_c);
 	    }
 	  CATCH (ex, RETURN_MASK_ERROR)
 	    {
 	    }
 	  END_CATCH
 
-	  if (expr != NULL && expr->elts[0].opcode == OP_TYPE)
-	    type = expr->elts[1].type;
+	  if (expr != NULL && expr.get ()->elts[0].opcode == OP_TYPE)
+	    type = expr.get ()->elts[1].type;
 
 	  args.emplace_back (type, std::move (type_str), std::move (expr));
 	}