diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index 22c1505ad290..281702de9772 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -140,9 +140,9 @@ static int psi_bug __read_mostly;
 DEFINE_STATIC_KEY_FALSE(psi_disabled);
 
 #ifdef CONFIG_PSI_DEFAULT_DISABLED
-bool psi_enable;
+static bool psi_enable;
 #else
-bool psi_enable = true;
+static bool psi_enable = true;
 #endif
 static int __init setup_psi(char *str)
 {