diff --git a/monkey/monkey_island/cc/models/machine.py b/monkey/monkey_island/cc/models/machine.py
index b09e8bf99..31c5d41ad 100644
--- a/monkey/monkey_island/cc/models/machine.py
+++ b/monkey/monkey_island/cc/models/machine.py
@@ -26,7 +26,7 @@ class Machine(MutableInfectionMonkeyBaseModel):
     operating_system: Optional[OperatingSystem]
     """The operating system the machine is running"""
 
-    operating_system_version: str
+    operating_system_version: str = Field(default="")
     """The specific version of the operating system the machine is running"""
 
     hostname: str
diff --git a/monkey/tests/unit_tests/monkey_island/cc/models/test_machine.py b/monkey/tests/unit_tests/monkey_island/cc/models/test_machine.py
index a81f1823f..e60069ed6 100644
--- a/monkey/tests/unit_tests/monkey_island/cc/models/test_machine.py
+++ b/monkey/tests/unit_tests/monkey_island/cc/models/test_machine.py
@@ -180,6 +180,15 @@ def test_set_operating_system_version():
     m.operating_system_version = "1234"
 
 
+def test_operating_system_version_default_value():
+    missing_operating_system_version_dict = MACHINE_OBJECT_DICT.copy()
+    del missing_operating_system_version_dict["operating_system_version"]
+
+    m = Machine(**missing_operating_system_version_dict)
+
+    assert m.operating_system_version == ""
+
+
 def test_set_hostname():
     m = Machine(**MACHINE_OBJECT_DICT)