diff --git a/ext/oj/object.c b/ext/oj/object.c
index 1675c837..dac99839 100644
--- a/ext/oj/object.c
+++ b/ext/oj/object.c
@@ -324,26 +324,30 @@ static int hat_value(ParseInfo pi, Val parent, const char *key, size_t klen, vol
                 // If struct is not defined then we let this fail and raise an exception.
                 sc = oj_name2struct(pi, *RARRAY_PTR(value), rb_eArgError);
             }
-            // Create a properly initialized struct instance without calling the initialize method.
-            parent->val = rb_obj_alloc(sc);
-            // If the JSON array has more entries than the struct class allows, we record an error.
+            if (sc == rb_cRange) {
+              parent->val = rb_class_new_instance(len - 1, RARRAY_PTR(value) + 1, rb_cRange);
+            } else {
+                // Create a properly initialized struct instance without calling the initialize method.
+                parent->val = rb_obj_alloc(sc);
+                // If the JSON array has more entries than the struct class allows, we record an error.
 #ifdef RSTRUCT_LEN
 #if RSTRUCT_LEN_RETURNS_INTEGER_OBJECT
             slen = (int)NUM2LONG(RSTRUCT_LEN(parent->val));
 #else   // RSTRUCT_LEN_RETURNS_INTEGER_OBJECT
-            slen = (int)RSTRUCT_LEN(parent->val);
+                slen = (int)RSTRUCT_LEN(parent->val);
 #endif  // RSTRUCT_LEN_RETURNS_INTEGER_OBJECT
 #else
-            slen = FIX2INT(rb_funcall2(parent->val, oj_length_id, 0, 0));
+                slen = FIX2INT(rb_funcall2(parent->val, oj_length_id, 0, 0));
 #endif
-            // MRI >= 1.9
-            if (len - 1 > slen) {
-                oj_set_error_at(pi, oj_parse_error_class, __FILE__, __LINE__, "Invalid struct data");
-            } else {
-                int i;
+                // MRI >= 1.9
+                if (len - 1 > slen) {
+                    oj_set_error_at(pi, oj_parse_error_class, __FILE__, __LINE__, "Invalid struct data");
+                } else {
+                    int i;
 
-                for (i = 0; i < len - 1; i++) {
-                    rb_struct_aset(parent->val, INT2FIX(i), RARRAY_PTR(value)[i + 1]);
+                    for (i = 0; i < len - 1; i++) {
+                        rb_struct_aset(parent->val, INT2FIX(i), RARRAY_PTR(value)[i + 1]);
+                    }
                 }
             }
             return 1;
diff --git a/ext/oj/oj.c b/ext/oj/oj.c
index 2559a635..211e2472 100644
--- a/ext/oj/oj.c
+++ b/ext/oj/oj.c
@@ -932,7 +932,7 @@ static int parse_options_cb(VALUE k, VALUE v, VALUE opts) {
         if (Qnil == v) {
             return ST_CONTINUE;
         }
-        if (TYPE(v) == T_STRUCT && rb_obj_class(v) == rb_cRange) {
+        if (rb_obj_class(v) == rb_cRange) {
             VALUE min = rb_funcall(v, oj_begin_id, 0);
             VALUE max = rb_funcall(v, oj_end_id, 0);
 
diff --git a/test/test_integer_range.rb b/test/test_integer_range.rb
index 88df49d0..761fca93 100755
--- a/test/test_integer_range.rb
+++ b/test/test_integer_range.rb
@@ -23,24 +23,18 @@ def teardown
   end
 
   def test_range
-    skip 'TruffleRuby fails this spec with `ArgumentError: :integer_range must be a range of Fixnum.`' if RUBY_ENGINE == 'truffleruby'
-
     test = {s: 0, s2: -1, s3: 1, u: -2, u2: 2, u3: 9007199254740993}
     exp = '{"s":0,"s2":-1,"s3":1,"u":"-2","u2":"2","u3":"9007199254740993"}'
     assert_equal(exp, Oj.dump(test, integer_range: (-1..1)))
   end
 
   def test_bignum
-    skip 'TruffleRuby fails this spec with `ArgumentError: :integer_range must be a range of Fixnum.`' if RUBY_ENGINE == 'truffleruby'
-
     test = {u: -10000000000000000000, u2: 10000000000000000000}
     exp = '{"u":"-10000000000000000000","u2":"10000000000000000000"}'
     assert_equal(exp, Oj.dump(test, integer_range: (-1..1)))
   end
 
   def test_valid_modes
-    skip 'TruffleRuby fails this spec with `ArgumentError: :integer_range must be a range of Fixnum.`' if RUBY_ENGINE == 'truffleruby'
-
     test = {safe: 0, unsafe: 9007199254740993}
     exp  = '{"safe":0,"unsafe":"9007199254740993"}'