diff --git a/pkgs/lib/trivial.nix b/pkgs/lib/trivial.nix
index 35e4f3ee9f9d..aaae36afa058 100644
--- a/pkgs/lib/trivial.nix
+++ b/pkgs/lib/trivial.nix
@@ -15,6 +15,7 @@ rec {
   # Take a function and evaluate it with its own returned value.
   fix = f: let result = f result; in result;
 
-  # Flip argument order
-  flip = f: x: y: f y x;
+  # Flip the order of the arguments of a binary function.
+  flip = f: a: b: f b a;
+
 }