diff --git a/Lib/random.py b/Lib/random.py
index ad1c9167b02a65..941f2825de5f49 100644
--- a/Lib/random.py
+++ b/Lib/random.py
@@ -539,7 +539,7 @@ def gammavariate(self, alpha, beta):
                     return x * beta
 
         elif alpha == 1.0:
-            # expovariate(1)
+            # expovariate(1/beta)
             u = random()
             while u <= 1e-7:
                 u = random()