diff --git a/lib/std/fmt.zig b/lib/std/fmt.zig
index c3f0209e16..f8401521d4 100644
--- a/lib/std/fmt.zig
+++ b/lib/std/fmt.zig
@@ -64,7 +64,9 @@ fn peekIsAlign(comptime fmt: []const u8) bool {
 /// - `x` and `X`:
 ///   - format the non-numeric value as a string of bytes in hexadecimal notation ("binary dump") in either lower case or upper case
 ///   - output numeric value in hexadecimal notation
-/// - `s`: print a pointer-to-many as a c-string, use zero-termination
+/// - `s`:
+///   - for pointer-to-many and C pointers of u8, print as a C-string using zero-termination
+///   - for slices of u8, print the entire slice as a string without zero-termination
 /// - `z`: escape the string with @"" syntax if it is not a valid Zig identifier.
 /// - `Z`: print the string escaping non-printable characters using Zig escape sequences.
 /// - `B` and `Bi`: output a memory size in either metric (1000) or power-of-two (1024) based notation. works for both float and integer values.