diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index fadc59708ece0..744e51c4a6bd0 100644
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -178,6 +178,7 @@ void perf_env__exit(struct perf_env *env)
 	zfree(&env->cpuid);
 	zfree(&env->cmdline);
 	zfree(&env->cmdline_argv);
+	zfree(&env->sibling_dies);
 	zfree(&env->sibling_cores);
 	zfree(&env->sibling_threads);
 	zfree(&env->pmu_mappings);