diff --git a/src/patrix/mqtt.cpp b/src/patrix/mqtt.cpp
index ccbec93..38c36c8 100644
--- a/src/patrix/mqtt.cpp
+++ b/src/patrix/mqtt.cpp
@@ -79,10 +79,16 @@ void mqttPublishValue(const String& name, const uint64_t value, const char *unit
 }
 
 void mqttPublishValue(const String& name, const float value, const char *unit) {
+  if (isnan(value)) {
+    return;
+  }
   mqttPublishValue(name, String(value), unit);
 }
 
 void mqttPublishValue(const String& name, const double value, const char *unit) {
+  if (isnan(value)) {
+    return;
+  }
   mqttPublishValue(name, String(value), unit);
 }