diff --git a/scripts/idl/generators/types.py b/scripts/idl/generators/types.py
index f1fc72aa2eaa7f..e96e852dac6b96 100644
--- a/scripts/idl/generators/types.py
+++ b/scripts/idl/generators/types.py
@@ -213,7 +213,7 @@ def is_struct(self) -> bool:
     "systime_us": BasicInteger(idl_name="systime_us", byte_count=8, is_signed=True),
     "tod": BasicInteger(idl_name="tod", byte_count=4, is_signed=True),
     "trans_id": BasicInteger(idl_name="trans_id", byte_count=4, is_signed=True),
-    "utc": BasicInteger(idl_name="utc", byte_count=4, is_signed=True),
+    "utc": BasicInteger(idl_name="utc", byte_count=4, is_signed=False),
     "vendor_id": BasicInteger(idl_name="vendor_id", byte_count=2, is_signed=False),
 }