diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1150444..0707423 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2146,7 +2146,7 @@
 
 	thermal.crt=	[HW,ACPI]
 			-1: disable all critical trip points in all thermal zones
-			<degrees C>: lower all critical trip points
+			<degrees C>: override all critical trip points
 
 	thermal.nocrt=	[HW,ACPI]
 			Set to disable actions on ACPI thermal zone
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index e052a75..e9e17df 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -388,10 +388,12 @@
 			} else if (crt > 0) {
 				unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
 				/*
-				 * Allow override to lower critical threshold
+				 * Allow override critical threshold
 				 */
-				if (crt_k < tz->trips.critical.temperature)
-					tz->trips.critical.temperature = crt_k;
+				if (crt_k > tz->trips.critical.temperature)
+					printk(KERN_WARNING PREFIX
+						"Critical threshold %d C\n", crt);
+				tz->trips.critical.temperature = crt_k;
 			}
 		}
 	}