diff --git a/caso/record.py b/caso/record.py
index b259ea5..2f3f0f7 100644
--- a/caso/record.py
+++ b/caso/record.py
@@ -232,6 +232,11 @@ def ssm_message(self):
         # done. In order to get objects correctly serialized we need to convert to JSON,
         # then reload the model
         serialized_record = json.loads(self.model_dump_json(**opts))
+        # CPU and Wall duration may be 0 as we are converting float to int when creating
+        # the record, here we impose at least 1 second to avoid reporting no cpu time
+        for f in ["CpuDuration", "WallDuration"]:
+            if f in serialized_record and serialized_record[f] == 0:
+                serialized_record[f] = 1
         aux = [f"{k}: {v}" for k, v in serialized_record.items()]
         aux.sort()
         return "\n".join(aux)
diff --git a/caso/tests/conftest.py b/caso/tests/conftest.py
index ef59f3e..dd181eb 100644
--- a/caso/tests/conftest.py
+++ b/caso/tests/conftest.py
@@ -335,6 +335,15 @@ def valid_cloud_record() -> dict:
     return valid_cloud_records_dict[0]
 
 
+@pytest.fixture()
+def zero_cpu_cloud_record() -> caso.record.CloudRecord:
+    """Get a fixture for the CloudRecord with 0 cpu and wall time."""
+    record = caso.record.CloudRecord(**valid_cloud_records_fields[0])
+    record.cpu_duration = 0
+    record.wall_duration = 0
+    return record
+
+
 @pytest.fixture()
 def valid_cloud_records() -> typing.List[dict]:
     """Get a fixture for valid records as a dict."""
diff --git a/caso/tests/test_record.py b/caso/tests/test_record.py
index f2ce9b3..711bd9b 100644
--- a/caso/tests/test_record.py
+++ b/caso/tests/test_record.py
@@ -88,6 +88,13 @@ def test_cloud_record_custom_cpu(cloud_record):
     assert cloud_record.cpu_duration == cpu
 
 
+def test_cloud_record_zero_cpu(zero_cpu_cloud_record):
+    """Test a cloud record with 0 CPU time is correctly rendered."""
+    ssm_message = zero_cpu_cloud_record.ssm_message()
+    assert "CpuDuration: 1" in ssm_message
+    assert "WallDuration: 1" in ssm_message
+
+
 def test_ip_record(ip_record):
     """Test that an IP record is correctly generated."""
     assert isinstance(ip_record.measure_time, datetime.datetime)