diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19ecc0aa3..6ab35aedf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
 ### Bugfixes
 - [#128](https://github.com/influxdb/telegraf/issues/128): system_load measurement missing.
 - [#129](https://github.com/influxdb/telegraf/issues/129): Latest pkg url fix.
+- [#140](https://github.com/influxdb/telegraf/issues/140): Memory plugin prec->perc typo fix. Thanks @brunoqc!
 
 ## v0.1.6 [2015-08-20]
 
diff --git a/plugins/system/memory.go b/plugins/system/memory.go
index c835dc76d..048012e83 100644
--- a/plugins/system/memory.go
+++ b/plugins/system/memory.go
@@ -27,7 +27,7 @@ func (s *MemStats) Gather(acc plugins.Accumulator) error {
 	acc.Add("total", vm.Total, vmtags)
 	acc.Add("available", vm.Available, vmtags)
 	acc.Add("used", vm.Used, vmtags)
-	acc.Add("used_prec", vm.UsedPercent, vmtags)
+	acc.Add("used_perc", vm.UsedPercent, vmtags)
 	acc.Add("free", vm.Free, vmtags)
 	acc.Add("active", vm.Active, vmtags)
 	acc.Add("inactive", vm.Inactive, vmtags)
diff --git a/plugins/system/system_test.go b/plugins/system/system_test.go
index 19e05e64d..88a35071a 100644
--- a/plugins/system/system_test.go
+++ b/plugins/system/system_test.go
@@ -310,7 +310,7 @@ func TestSystemStats_GenerateStats(t *testing.T) {
 	assert.True(t, acc.CheckTaggedValue("total", uint64(12400), vmtags))
 	assert.True(t, acc.CheckTaggedValue("available", uint64(7600), vmtags))
 	assert.True(t, acc.CheckTaggedValue("used", uint64(5000), vmtags))
-	assert.True(t, acc.CheckTaggedValue("used_prec", float64(47.1), vmtags))
+	assert.True(t, acc.CheckTaggedValue("used_perc", float64(47.1), vmtags))
 	assert.True(t, acc.CheckTaggedValue("free", uint64(1235), vmtags))
 	assert.True(t, acc.CheckTaggedValue("active", uint64(8134), vmtags))
 	assert.True(t, acc.CheckTaggedValue("inactive", uint64(1124), vmtags))