diff --git a/src/Modulino.h b/src/Modulino.h
index 02fdaec..3bd53fc 100644
--- a/src/Modulino.h
+++ b/src/Modulino.h
@@ -418,6 +418,9 @@ class ModulinoDistance : public Module {
       return NAN;
     }
   }
+  bool isValid(float distance) {
+    return !isnan(distance);
+  }
 private:
   VL53L4CD* tof_sensor = nullptr;
   VL53L4CD_Result_t results;