diff --git a/documentation/tutorial.rst b/documentation/tutorial.rst
index 25d76fc..1e7b2b5 100644
--- a/documentation/tutorial.rst
+++ b/documentation/tutorial.rst
@@ -569,7 +569,7 @@ and count up.
     // Print out all cell voltages:
     for (uint8_t i=0; i<bms.get_num_cells(); i++) {
         // Print each voltage with 3 decimal places
-        lcd.println(bms.get_cell_voltage(i, 3));  
+        lcd.println(bms.get_cell_voltage(i), 3);  
     }