diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b647d5114..fdbc040f2b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -49,6 +49,8 @@ Bug-fixes
   re-exported in their full generality which would lead to unsolved meta variables at
   their use sites.
 
+* In `Data.Maybe.Base` the fixity declaration of `_<∣>_` was missing. This has been fixed.
+
 Non-backwards compatible changes
 --------------------------------
 
diff --git a/src/Data/Maybe/Base.agda b/src/Data/Maybe/Base.agda
index a26e3c102b..a9b4d819cb 100644
--- a/src/Data/Maybe/Base.agda
+++ b/src/Data/Maybe/Base.agda
@@ -100,6 +100,7 @@ just a  >>= f = f a
 
 -- Alternative: <∣>
 
+infixr 6 _<∣>_
 _<∣>_ : Maybe A → Maybe A → Maybe A
 just x  <∣> my = just x
 nothing <∣> my = my
diff --git a/src/Function/Strict.agda b/src/Function/Strict.agda
index e08796bb15..e0bcd697d5 100644
--- a/src/Function/Strict.agda
+++ b/src/Function/Strict.agda
@@ -20,7 +20,7 @@ private
     a b : Level
     A B : Set a
 
-infixl 0 _!|>′_ _!|>′_
+infixl 0 _!|>_ _!|>′_
 infixr -1 _$!_ _$!′_
 
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