diff --git a/lib/std/fmt.zig b/lib/std/fmt.zig
index 8deef118c01a..010e50e05ef9 100644
--- a/lib/std/fmt.zig
+++ b/lib/std/fmt.zig
@@ -664,6 +664,10 @@ pub fn formatType(
             if (max_depth == 0) {
                 return writer.writeAll("{ ... }");
             }
+            if (info.sentinel()) |s| {
+                const index = std.mem.indexOfSentinel(info.child, s, value[0..]);
+                return formatBuf(value[0..index], options, writer);
+            }
             if (actual_fmt[0] == 's' and info.child == u8) {
                 return formatBuf(&value, options, writer);
             }