diff --git a/Siton-firmware.ino b/Siton-firmware.ino
index 6cb4488..b961575 100644
--- a/Siton-firmware.ino
+++ b/Siton-firmware.ino
@@ -725,9 +725,9 @@ void mereni()
   // vypocet proudu - normalizuji z AD na Ampery
   Anormal = amp * (vcc / 1023.0);
   if (Anormal >= (vcc / 2)) {
-    Anormal = (Anormal - (vcc / 2)); // 0856 = 8,56A
+    Anormal = Anormal - (vcc / 2); // 0856 = 8,56A
   } else {
-    Anormal = (vcc / 2) - ( amp - 1 ) * (vcc / 1023.0);
+    Anormal = (vcc / 2) - Anormal;
   }
   //Anormal = 9;//###DEBUG###
   Anormal = Anormal + ((Anormal / 100) * (kalibA / 10)); //kalibrace hodnoty proudu