diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y
index 432b8560cf51c8bf2d751d409d34fe516ade2582..e7bd19c384aedc17e83e0ad1e2535829900475b6 100644
--- a/tools/perf/util/expr.y
+++ b/tools/perf/util/expr.y
@@ -10,7 +10,8 @@
 #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 }
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index da8fe57691b8cd0d4c1c22d0cf0fa62595385ac5..8d7578be708a21fe0970d40ed9a71229f4e7c6fd 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -1,4 +1,4 @@
-%pure-parser
+%define api.pure full
 %parse-param {void *_parse_state}
 %parse-param {void *scanner}
 %lex-param {void* scanner}