diff --git a/src/thd_cdev_rapl.h b/src/thd_cdev_rapl.h
index 856ffece..8af15d3d 100644
--- a/src/thd_cdev_rapl.h
+++ b/src/thd_cdev_rapl.h
@@ -70,7 +70,7 @@ class cthd_sysfs_cdev_rapl: public cthd_cdev {
 	static const int rapl_no_time_windows = 6;
 	static const long def_rapl_time_window = 1000000; // micro seconds
 	static const int rapl_min_default_step = 500000; //0.5W
-	static const int rapl_max_sane_phy_max = 100000000; // Some sane very high value in uW
+	static const int rapl_max_sane_phy_max = 1000000000; // Sane upper bound in uW (1000W)
 
 	static const int rapl_low_limit_percent = 50;
 	static const int rapl_power_dec_percent = 5;