diff --git a/tasmota/support_rotary.ino b/tasmota/support_rotary.ino
index cb6782da1..071b15b92 100644
--- a/tasmota/support_rotary.ino
+++ b/tasmota/support_rotary.ino
@@ -43,7 +43,7 @@ void update_rotary(void) ICACHE_RAM_ATTR;
 void update_rotary(void)
 {
   if (MI_DESK_LAMP == my_module_type) {
-    if (LightPower()) {
+    if (LightPowerIRAM()) {
       /*
       * https://github.com/PaulStoffregen/Encoder/blob/master/Encoder.h
       */
diff --git a/tasmota/xdrv_04_light.ino b/tasmota/xdrv_04_light.ino
index 600642bfe..736d46e5a 100644
--- a/tasmota/xdrv_04_light.ino
+++ b/tasmota/xdrv_04_light.ino
@@ -277,6 +277,16 @@ power_t LightPower(void)
   return Light.power;                     // Make external
 }
 
+// IRAM variant for rotary
+#ifndef ARDUINO_ESP8266_RELEASE_2_3_0      // Fix core 2.5.x ISR not in IRAM Exception
+power_t LightPowerIRAM(void) ICACHE_RAM_ATTR;
+#endif  // ARDUINO_ESP8266_RELEASE_2_3_0
+
+power_t LightPowerIRAM(void)
+{
+  return Light.power;                     // Make external
+}
+
 uint8_t LightDevice(void)
 {
   return Light.device;                    // Make external