diff --git a/src/terminfo/Source.zig b/src/terminfo/Source.zig
index 2190e0210..82bb7f1fc 100644
--- a/src/terminfo/Source.zig
+++ b/src/terminfo/Source.zig
@@ -86,7 +86,7 @@ pub fn xtgettcapMap(comptime self: Source) type {
             .boolean => "",
             .string => |v| v,
             .numeric => |v| numeric: {
-                var buf: [1024]u8 = undefined;
+                var buf: [10]u8 = undefined;
                 const num_len = std.fmt.formatIntBuf(&buf, v, 10, .upper, .{});
                 break :numeric buf[0..num_len];
             },