1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y
index 432b8560cf51..7d226241f1d7 100644
--- a/tools/perf/util/expr.y
+++ b/tools/perf/util/expr.y
@@ -2,15 +2,18 @@
 %{
 #include "util.h"
 #include "util/debug.h"
+#include <stdlib.h> // strtod()
 #define IN_EXPR_Y 1
 #include "expr.h"
 #include "smt.h"
+#include <assert.h>
 #include <string.h>
 
 #define MAXIDLEN 256
 %}
 
-%pure-parser
+%define api.pure full
+
 %parse-param { double *final_val }
 %parse-param { struct parse_ctx *ctx }
 %parse-param { const char **pp }