diff --git a/tasmota/tasmota_xsns_sensor/xsns_96_flowratemeter.ino b/tasmota/tasmota_xsns_sensor/xsns_96_flowratemeter.ino
index 1b727dba0..4e43bd6b8 100644
--- a/tasmota/tasmota_xsns_sensor/xsns_96_flowratemeter.ino
+++ b/tasmota/tasmota_xsns_sensor/xsns_96_flowratemeter.ino
@@ -104,8 +104,10 @@ void FlowRateMeterInit(void)
 
   flowratemeter_valuesread = false;
   for (uint32_t i = 0; i < MAX_FLOWRATEMETER; i++) {
-    pinMode(Pin(GPIO_FLOWRATEMETER_IN, i), INPUT);
-    attachInterrupt(Pin(GPIO_FLOWRATEMETER_IN, i), irq_service[i], RISING);
+    if (PinUsed(GPIO_FLOWRATEMETER_IN, i)) {
+      pinMode(Pin(GPIO_FLOWRATEMETER_IN, i), INPUT);
+      attachInterrupt(Pin(GPIO_FLOWRATEMETER_IN, i), irq_service[i], RISING);
+    }
   }
 }