diff --git a/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.cpp b/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.cpp
index b0ea648..f5ce161 100644
--- a/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.cpp
+++ b/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.cpp
@@ -30,7 +30,7 @@ void CurrentTransformerCard::loop()
     if (this->lastConversionTime == 0) {
         this->lastConversionTime = millis();
     }
-    static uint32_t lastConversionLoopTime = 0;
+
     if (millis() - lastConversionLoopTime > this->conversionInterval) {
         this->beginConversion();
         lastConversionLoopTime = millis();
diff --git a/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.hpp b/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.hpp
index 9dfa44a..708a3f9 100644
--- a/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.hpp
+++ b/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/CurrentTransformerCard.hpp
@@ -46,5 +46,6 @@ class CurrentTransformerCard : public ExpansionCard
         std::function<float(uint16_t)> adcToCurrent; // std::function that convert adc value to current in amps
         uint8_t handler_count = 0;
         std::map<uint8_t,std::function<void(float, double)>> callbacks;
+        uint32_t lastConversionLoopTime;
 };