diff --git a/DMRSlot.cpp b/DMRSlot.cpp
index 30f7f0c..e8462f1 100644
--- a/DMRSlot.cpp
+++ b/DMRSlot.cpp
@@ -2321,6 +2321,9 @@ void CDMRSlot::enable(bool enabled)
 
 void CDMRSlot::writeJSONRSSI()
 {
+	if (m_rssi == 0U)
+		return;
+
 	if (m_rssiCount >= RSSI_COUNT) {
 		nlohmann::json json;
 
diff --git a/DStarControl.cpp b/DStarControl.cpp
index ee9ad0d..197eda8 100644
--- a/DStarControl.cpp
+++ b/DStarControl.cpp
@@ -1395,6 +1395,9 @@ void CDStarControl::enable(bool enabled)
 
 void CDStarControl::writeJSONRSSI()
 {
+	if (m_rssi == 0U)
+		return;
+
 	if (m_rssiCountTotal >= RSSI_COUNT) {
 		nlohmann::json json;
 
diff --git a/M17Control.cpp b/M17Control.cpp
index 945bdd3..40c767c 100644
--- a/M17Control.cpp
+++ b/M17Control.cpp
@@ -1027,6 +1027,9 @@ void CM17Control::enable(bool enabled)
 
 void CM17Control::writeJSONRSSI()
 {
+	if (m_rssi == 0U)
+		return;
+
 	if (m_rssiCountTotal >= RSSI_COUNT) {
 		nlohmann::json json;
 
diff --git a/NXDNControl.cpp b/NXDNControl.cpp
index cbe9051..fc66659 100644
--- a/NXDNControl.cpp
+++ b/NXDNControl.cpp
@@ -1178,6 +1178,9 @@ void CNXDNControl::enable(bool enabled)
 
 void CNXDNControl::writeJSONRSSI()
 {
+	if (m_rssi == 0U)
+		return;
+
 	if (m_rssiCount >= RSSI_COUNT) {
 		nlohmann::json json;
 
diff --git a/P25Control.cpp b/P25Control.cpp
index d000516..40a5fc6 100644
--- a/P25Control.cpp
+++ b/P25Control.cpp
@@ -1220,6 +1220,9 @@ void CP25Control::enable(bool enabled)
 
 void CP25Control::writeJSONRSSI()
 {
+	if (m_rssi == 0U)
+		return;
+
 	if (m_rssiCount >= RSSI_COUNT) {
 		nlohmann::json json;
 
diff --git a/YSFControl.cpp b/YSFControl.cpp
index ab9cd4f..2342ae3 100644
--- a/YSFControl.cpp
+++ b/YSFControl.cpp
@@ -1273,6 +1273,9 @@ void CYSFControl::enable(bool enabled)
 
 void CYSFControl::writeJSONRSSI()
 {
+	if (m_rssi == 0U)
+		return;
+
 	if (m_rssiCount >= RSSI_COUNT) {
 		nlohmann::json json;