diff --git a/kernel/power/main.c b/kernel/power/main.c
index 0828070d38b4..1d1bf630e6e9 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -530,6 +530,10 @@ pm_trace_store(struct kobject *kobj, struct kobj_attribute *attr,
 
 	if (sscanf(buf, "%d", &val) == 1) {
 		pm_trace_enabled = !!val;
+		if (pm_trace_enabled) {
+			pr_warn("PM: Enabling pm_trace changes system date and time during resume.\n"
+				"PM: Correct system time has to be restored manually after resume.\n");
+		}
 		return n;
 	}
 	return -EINVAL;