diff --git a/src/lib/buzz_std.zig b/src/lib/buzz_std.zig
index 946952b1..d7c9ef3d 100644
--- a/src/lib/buzz_std.zig
+++ b/src/lib/buzz_std.zig
@@ -102,7 +102,7 @@ export fn parseInt(ctx: *api.NativeCtx) c_int {
 
     const string_slice = string.?[0..len];
 
-    const number: i32 = std.fmt.parseInt(i32, string_slice, 10) catch {
+    const number = std.fmt.parseInt(i32, string_slice, 10) catch {
         ctx.vm.bz_push(api.Value.Null);
 
         return 1;
@@ -113,6 +113,35 @@ export fn parseInt(ctx: *api.NativeCtx) c_int {
     return 1;
 }
 
+export fn parseUd(ctx: *api.NativeCtx) c_int {
+    const string_value = ctx.vm.bz_peek(0);
+
+    var len: usize = 0;
+    const string = string_value.bz_valueToString(&len);
+
+    if (len == 0) {
+        ctx.vm.bz_push(api.Value.Null);
+
+        return 1;
+    }
+
+    const string_slice = string.?[0..len];
+
+    const number = std.fmt.parseInt(u64, string_slice, 10) catch {
+        ctx.vm.bz_push(api.Value.Null);
+
+        return 1;
+    };
+
+    if (api.ObjUserData.bz_newUserData(ctx.vm, number)) |userdata| {
+        ctx.vm.bz_pushUserData(userdata);
+
+        return 1;
+    } else {
+        @panic("Out of memory");
+    }
+}
+
 export fn parseFloat(ctx: *api.NativeCtx) c_int {
     const string_value = ctx.vm.bz_peek(0);
 
diff --git a/src/lib/std.buzz b/src/lib/std.buzz
index 601a7fcd..3ed90625 100644
--- a/src/lib/std.buzz
+++ b/src/lib/std.buzz
@@ -7,12 +7,12 @@ export extern fun assert(bool condition, str? message = null) > void;
 || @param value value to print
 export extern fun print(str value) > void;
 
-|| Parse number, returns false if string does not represent a number
+|| Parse integer, returns false if string does not represent a integer
 || @param string string to parse
 || @return integer parsed or null
 export extern fun parseInt(str string) > int?;
 
-|| Parse number, returns false if string does not represent a number
+|| Parse float, returns false if string does not represent a float
 || @param string string to parse
 || @return float parsed or null
 export extern fun parseFloat(str string) > float?;
@@ -33,6 +33,11 @@ export extern fun toFloat(int n) > float;
 || @return casted value or 0 if value provided is not a number
 export extern fun toUd(any n) > ud;
 
+|| Parse ud, returns false if string does not represent a ud (u64)
+|| @param string string to parse
+|| @return ud parsed or null
+export extern fun parseUd(str string) > ud?;
+
 || Return ascii char for given byte
 export extern fun char(int byte) > str;
 
diff --git a/src/obj.zig b/src/obj.zig
index 418c34e5..f628ef84 100644
--- a/src/obj.zig
+++ b/src/obj.zig
@@ -451,6 +451,12 @@ pub const Obj = struct {
 
                 return self_enum_instance.enum_ref == other_enum_instance.enum_ref and self_enum_instance.case == other_enum_instance.case;
             },
+            .UserData => {
+                const self_userdata: *ObjUserData = ObjUserData.cast(self).?;
+                const other_userdata: *ObjUserData = ObjUserData.cast(other).?;
+
+                return self_userdata.userdata == other_userdata.userdata;
+            },
             .Bound,
             .Closure,
             .Function,
@@ -460,7 +466,6 @@ pub const Obj = struct {
             .Map,
             .Enum,
             .Native,
-            .UserData,
             .Fiber,
             .ForeignStruct,
             => {
diff --git a/tests/023-std.buzz b/tests/023-std.buzz
index 84af23b1..e6e10489 100644
--- a/tests/023-std.buzz
+++ b/tests/023-std.buzz
@@ -9,6 +9,8 @@ test "parseInt/Float" {
     assert(toFloat(23) == 23.0, message: "Could cast int to float");
     assert(toUd(23) is ud, message: "Could cast int to ud");
     assert(toUd(23.0) is ud, message: "Could cast float to ud");
+
+    assert(parseUd("42") == toUd(42), message: "Could parse ud");
 }
 
 test "char" {