diff --git a/pyphi/conf.py b/pyphi/conf.py
index d0185a9d2..2f9ea8a71 100644
--- a/pyphi/conf.py
+++ b/pyphi/conf.py
@@ -390,7 +390,7 @@ class PyphiConfig(Config):
         def always_zero(a, b):
             return 0
 
-    This measures can then be used by setting
+    This measure can then be used by setting
     ``config.MEASURE = 'ALWAYS_ZERO'``.
 
     If the measure is asymmetric you should register it using the