diff --git a/osaca/parser/parser_x86att.py b/osaca/parser/parser_x86att.py
index c6d67b8..155dd74 100644
--- a/osaca/parser/parser_x86att.py
+++ b/osaca/parser/parser_x86att.py
@@ -52,6 +52,7 @@ def construct_parser(self):
                 joinString="::",
             ).setResultsName("name")
             + pp.Optional(relocation).setResultsName("relocation")
+            + pp.Optional(pp.Suppress(pp.Optional(pp.Literal("+"))) + decimal_number).setResultsName("offset")
         ).setResultsName("identifier")
         # Label
         label_rest = pp.Word(pp.alphanums + "$_.+-()")
@@ -106,13 +107,13 @@ def construct_parser(self):
             ^ pp.Word(pp.nums)
             ^ pp.Group(
                 pp.Optional(offset.setResultsName("offset"))
-                + pp.Literal("(")
+                + pp.Optional(pp.Literal("(")
                 + pp.Optional(self.register.setResultsName("base"))
                 + pp.Optional(pp.Suppress(pp.Literal(",")))
                 + pp.Optional(self.register.setResultsName("index"))
                 + pp.Optional(pp.Suppress(pp.Literal(",")))
                 + pp.Optional(scale.setResultsName("scale"))
-                + pp.Literal(")")
+                + pp.Literal(")"))
             )
         )
         memory_segmentation = (
diff --git a/tests/test_parser_x86att.py b/tests/test_parser_x86att.py
index 72f273f..6ef83de 100755
--- a/tests/test_parser_x86att.py
+++ b/tests/test_parser_x86att.py
@@ -112,6 +112,9 @@ def test_parse_instruction(self):
         instr5 = "mov %ebx,var(,1)"
         instr6 = "lea (,%rax,8),%rbx"
         instr7 = "vinsertf128 $0x1, %xmm0, %ymm1, %ymm1"
+        instr8 = "cmpb $0, %fs:var@TPOFF"
+        instr9 = "movq	%rdi, %fs:var@TPOFF-8(%rcx)"
+        instr10 = "movq	$624, %fs:var@TPOFF+4992"
 
         parsed_1 = self.parser.parse_instruction(instr1)
         parsed_2 = self.parser.parse_instruction(instr2)
@@ -120,6 +123,9 @@ def test_parse_instruction(self):
         parsed_5 = self.parser.parse_instruction(instr5)
         parsed_6 = self.parser.parse_instruction(instr6)
         parsed_7 = self.parser.parse_instruction(instr7)
+        parsed_8 = self.parser.parse_instruction(instr8)
+        parsed_9 = self.parser.parse_instruction(instr9)
+        parsed_10 = self.parser.parse_instruction(instr10)
 
         self.assertEqual(parsed_1.mnemonic, "vcvtsi2ss")
         self.assertEqual(parsed_1.operands[0].name, "edx")
@@ -162,6 +168,27 @@ def test_parse_instruction(self):
         self.assertEqual(parsed_7.operands[2].name, "ymm1")
         self.assertEqual(parsed_7.operands[3].name, "ymm1")
 
+        self.assertEqual(parsed_8.mnemonic, "cmpb")
+        self.assertEqual(parsed_8.operands[0].value, 0)
+        self.assertEqual(parsed_8.operands[1].base.name, "fs")
+        self.assertEqual(parsed_8.operands[1].segment_ext[0]['offset']['identifier']['name'], "var")
+        self.assertEqual(parsed_8.operands[1].segment_ext[0]['offset']['identifier']['relocation'], "@TPOFF")
+
+        self.assertEqual(parsed_9.mnemonic, "movq")
+        self.assertEqual(parsed_9.operands[0].name, "rdi")
+        self.assertEqual(parsed_9.operands[1].base.name, "fs")
+        self.assertEqual(parsed_9.operands[1].segment_ext[0]['offset']['identifier']['name'], "var")
+        self.assertEqual(parsed_9.operands[1].segment_ext[0]['offset']['identifier']['relocation'], "@TPOFF")
+        self.assertEqual(parsed_9.operands[1].segment_ext[0]['offset']['identifier']['offset'][0], "-8")
+        self.assertEqual(parsed_9.operands[1].segment_ext[0]['base']['name'], "rcx")
+
+        self.assertEqual(parsed_10.mnemonic, "movq")
+        self.assertEqual(parsed_10.operands[0].value, 624)
+        self.assertEqual(parsed_10.operands[1].base.name, "fs")
+        self.assertEqual(parsed_10.operands[1].segment_ext[0]['offset']['identifier']['name'], "var")
+        self.assertEqual(parsed_10.operands[1].segment_ext[0]['offset']['identifier']['relocation'], "@TPOFF")
+        self.assertEqual(parsed_10.operands[1].segment_ext[0]['offset']['identifier']['offset'][0], "4992")
+
     def test_parse_line(self):
         line_comment = "# -- Begin  main"
         line_label = "..B1.7:                         # Preds ..B1.6"