diff --git a/src/spdx_tools/spdx3/model/software/software_purpose.py b/src/spdx_tools/spdx3/model/software/software_purpose.py
index 4e071181f..e3a4d48cf 100644
--- a/src/spdx_tools/spdx3/model/software/software_purpose.py
+++ b/src/spdx_tools/spdx3/model/software/software_purpose.py
@@ -24,5 +24,6 @@ class SoftwarePurpose(Enum):
     OPERATING_SYSTEM = auto()
     OTHER = auto()
     PATCH = auto()
+    REQUIREMENT = auto()
     SOURCE = auto()
     TEST = auto()