diff --git a/json.zig b/json.zig
index 82e03a59bbf5f2a8612b512ddf4c0023b498655f..d5f5c1f2527d36dbaeaf849e47dc1863895bdbef 100644
--- a/json.zig
+++ b/json.zig
@@ -702,7 +702,7 @@ pub const NumberIndex = enum(u32) {
 
     pub fn get(this: NumberIndex, comptime T: type) T {
         return switch (@typeInfo(T)) {
-            .int => std.fmt.parseInt(T, this.to(), 10) catch unreachable,
+            .int => extras.parseDigits(T, this.to(), 10) catch unreachable,
             .float => std.fmt.parseFloat(T, this.to()) catch unreachable,
             else => @compileError("not a number type"),
         };