diff --git a/cpu/saml21/periph/pm.c b/cpu/saml21/periph/pm.c
index 7ad31c4289..af839e5bd9 100644
--- a/cpu/saml21/periph/pm.c
+++ b/cpu/saml21/periph/pm.c
@@ -41,7 +41,7 @@ void pm_set(unsigned mode)
             default: /* Falls through */
             case 2:
                 DEBUG_PUTS("pm_set(): setting IDLE mode.");
-#if defined(CPU_MODEL_SAMR30G18A) || defined(CPU_MODEL_SAMR34J18B)
+#if !defined(PM_SLEEPCFG_SLEEPMODE_IDLE2)
                 _mode = PM_SLEEPCFG_SLEEPMODE_IDLE;
 #else
                 _mode = PM_SLEEPCFG_SLEEPMODE_IDLE2;