diff --git a/src/netedit/elements/additional/GNEDetector.cpp b/src/netedit/elements/additional/GNEDetector.cpp
index 685866cd098..8be8fd675f1 100644
--- a/src/netedit/elements/additional/GNEDetector.cpp
+++ b/src/netedit/elements/additional/GNEDetector.cpp
@@ -324,7 +324,7 @@ GNEDetector::isDetectorValid(SumoXMLAttr key, const std::string& value) {
 
 void
 GNEDetector::writeDetectorValues(OutputDevice& device) const {
-    if (myPeriod != SUMOTime_MAX_PERIOD) {
+    if ((myPeriod > 0) && (myPeriod != SUMOTime_MAX_PERIOD)) {
         device.writeAttr(SUMO_ATTR_PERIOD, time2string(myPeriod));
     }
     if (myAdditionalName.size() > 0) {