diff --git a/docs/spec/abci/apps.md b/docs/spec/abci/apps.md
index 47e62eed..908ad3ea 100644
--- a/docs/spec/abci/apps.md
+++ b/docs/spec/abci/apps.md
@@ -265,7 +265,7 @@ This is enforced by Tendermint consensus.
 If a block includes evidence older than this, the block will be rejected
 (validators won't vote for it).
 
-Must have `0 < MaxAge`.
+Must have `MaxAge > 0`.
 
 ### Updates