diff --git a/doc/source/measurements.rst b/doc/source/measurements.rst
index 6bdcefd96..617135a17 100644
--- a/doc/source/measurements.rst
+++ b/doc/source/measurements.rst
@@ -73,7 +73,7 @@ instance:<type>                  g      instance   inst ID   both      1, 2, 3,
 memory                           g      MB         inst ID   n         1, 2           Volume of RAM allocated
 memory.usage                     g      MB         inst ID   p         1, 2, 3, 4     Volume of RAM used
 cpu                              c      ns         inst ID   p         1, 2           CPU time used
-cpu_util                         g      %          inst ID   p         1, 2, 3, 4     Average CPU utilisation
+cpu_util                         g      %          inst ID   p         1, 2, 3, 4     Average CPU utilization
 vcpus                            g      vcpu       inst ID   n         1, 2           Number of VCPUs
 disk.read.requests               c      request    inst ID   p         1, 2           Number of read requests
 disk.read.requests.rate          g      request/s  inst ID   p         1, 2, 3        Average rate of reads
diff --git a/doc/source/webapi/v2.rst b/doc/source/webapi/v2.rst
index 463b1fe0b..590c0baba 100644
--- a/doc/source/webapi/v2.rst
+++ b/doc/source/webapi/v2.rst
@@ -347,7 +347,7 @@ Get the list of samples about instances with *m1.tiny* flavor running for June
 
 Now you may want to have statistics on the meters you are targeting.
 Consider the following example where you are getting the list of samples
-about CPU utilisation of a given instance (identified by its *resource_id*)
+about CPU utilization of a given instance (identified by its *resource_id*)
 running for June 2013::
 
     GET /v2/meters/cpu_util