diff --git a/gitgoing/gitgoing.py b/gitgoing/gitgoing.py
index 375b900..d7e620d 100755
--- a/gitgoing/gitgoing.py
+++ b/gitgoing/gitgoing.py
@@ -57,7 +57,7 @@ def cv(x):
     cv : float
         The coefficient of variation of the entire array
     """
-    return mean_plus_one(x)/std_plus_one(x)
+    return std_plus_one(x)/mean_plus_one(x)
 
 def is_neuron_component(component):
     return component in NEURON_COMPONENTS
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