diff --git a/service/job/internal/src/main/java/org/eclipse/kapua/service/job/step/internal/JobStepServiceImpl.java b/service/job/internal/src/main/java/org/eclipse/kapua/service/job/step/internal/JobStepServiceImpl.java
index 3deed0e8b5f..d095c0b6804 100644
--- a/service/job/internal/src/main/java/org/eclipse/kapua/service/job/step/internal/JobStepServiceImpl.java
+++ b/service/job/internal/src/main/java/org/eclipse/kapua/service/job/step/internal/JobStepServiceImpl.java
@@ -391,10 +391,13 @@ private void validateJobStepProperties(List<JobStepProperty> jobStepProperties,
                         ArgumentValidator.notNull(jobStepProperty.getPropertyValue(), "stepProperties[]." + jobStepProperty.getName());
                     }
 
-                    ArgumentValidator.areEqual(jobStepProperty.getPropertyType(), jobStepDefinitionProperty.getPropertyType(), "stepProperties[]." + jobStepProperty.getName());
-                    ArgumentValidator.lengthRange(jobStepProperty.getPropertyValue(), jobStepDefinitionProperty.getMinLength(), jobStepDefinitionProperty.getMaxLength(), "stepProperties[]." + jobStepProperty.getName());
+                    if (jobStepProperty.getPropertyValue() != null) {
+                        ArgumentValidator.areEqual(jobStepProperty.getPropertyType(), jobStepDefinitionProperty.getPropertyType(), "stepProperties[]." + jobStepProperty.getName());
+                        ArgumentValidator.lengthRange(jobStepProperty.getPropertyValue(), jobStepDefinitionProperty.getMinLength(), jobStepDefinitionProperty.getMaxLength(),
+                                                      "stepProperties[]." + jobStepProperty.getName());
 
-                    validateJobStepPropertyValue(jobStepProperty, jobStepDefinitionProperty);
+                        validateJobStepPropertyValue(jobStepProperty, jobStepDefinitionProperty);
+                    }
                 }
             }
         }