diff --git a/zk/Feeders.md b/zk/Feeders.md
index 6f37379..27c7758 100644
--- a/zk/Feeders.md
+++ b/zk/Feeders.md
@@ -41,7 +41,7 @@ equal and opposite signals.
 Twin feeder is balanced because neither wire is grounded. Both have the same
 impedence to ground in a symmetrical fashion. If wire A is at +5V, wire B will
 be at -5V. Because of [alternating current](./Voltage_sources.md), they swap
-over their potential difference at each cycle, making them effeectively
+over their potential difference at each cycle, making them effectively
 interchangeable.
 
 ![](../img/feeder-balance.png)