diff --git a/src/canonicalize/Can.zig b/src/canonicalize/Can.zig
index 948b6c4a4e..1fe2626029 100644
--- a/src/canonicalize/Can.zig
+++ b/src/canonicalize/Can.zig
@@ -6339,6 +6339,7 @@ fn canonicalizePatternOrMalformed(
     }
 }
 
+/// Converts an AST pattern into a canonical pattern, introducing identifiers into scope.
 pub fn canonicalizePattern(
     self: *Self,
     ast_pattern_idx: AST.Pattern.Idx,