diff --git a/include/lib/psci/psci.h b/include/lib/psci/psci.h
index c40f955..f12a4d6 100644
--- a/include/lib/psci/psci.h
+++ b/include/lib/psci/psci.h
@@ -302,7 +302,7 @@
 
 	/*
 	 * Highest power level which takes part in a power management
-	 * operation.
+	 * operation. May be lower while the core is in suspend state.
 	 */
 	unsigned int target_pwrlvl;