diff --git a/cpu_temp/README.md b/cpu_temp/README.md
index dc03f86d..32f8cc67 100644
--- a/cpu_temp/README.md
+++ b/cpu_temp/README.md
@@ -2,4 +2,8 @@
 
 Python module for ganglia
 
-Read temperature from /sys/devices/platform/coretemp.*/
+It reads temperature from /sys/devices/platform/coretemp.\*/
+
+So, you need to insert the `coretemp` kernel module. <https://www.kernel.org/doc/Documentation/hwmon/coretemp>
+
+Usually, the command is `modprobe coretemp`.