diff --git a/DMRSlot.cpp b/DMRSlot.cpp
index 6b7b994..0ccd6cd 100644
--- a/DMRSlot.cpp
+++ b/DMRSlot.cpp
@@ -2368,6 +2368,9 @@ 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 acfc8f5..17ab462 100644
--- a/DStarControl.cpp
+++ b/DStarControl.cpp
@@ -1384,6 +1384,9 @@ 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 c1abf2e..fe3f4d0 100644
--- a/M17Control.cpp
+++ b/M17Control.cpp
@@ -1041,6 +1041,9 @@ 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 ca25f0c..f5d280f 100644
--- a/NXDNControl.cpp
+++ b/NXDNControl.cpp
@@ -1195,6 +1195,9 @@ 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 c75d891..7008fc8 100644
--- a/P25Control.cpp
+++ b/P25Control.cpp
@@ -1241,6 +1241,9 @@ 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 c7a2369..8afbdd2 100644
--- a/YSFControl.cpp
+++ b/YSFControl.cpp
@@ -1296,6 +1296,9 @@ void CYSFControl::enable(bool enabled)
 
 void CYSFControl::writeJSONRSSI()
 {
+	if (m_rssi == 0U)
+		return;
+
 	if (m_rssiCount >= RSSI_COUNT) {
 		nlohmann::json json;