diff --git a/src/string.h b/src/string.h
index 5dcc72c..1bcfad7 100644
--- a/src/string.h
+++ b/src/string.h
@@ -103,9 +103,9 @@ static INLINE Str str_skip(Str str, U32 len)
     return new_str;
 }
 
-// Destination must be at least source.len * 2. Returns hex_result.
+// hex_result must be at least source.len * 2. Returns hex_result.
 Str str_hex_encode(Str binary_data, Str hex_result);
-// Destination must be at least source.len / 2. Returns result.
+// result must be at least source.len / 2. Returns result.
 Str str_hex_decode(Str hex_str, Str result);
 
 static INLINE Str str_hex_encode_alloc(Allocator *allocator, Str binary_data)