diff --git a/rtl/apple1.v b/rtl/apple1.v
index 1e25531..4df20c9 100644
--- a/rtl/apple1.v
+++ b/rtl/apple1.v
@@ -40,7 +40,7 @@ module apple1(
     input ps2_clk,              // PS/2 keyboard serial clock input
     input ps2_din,              // PS/2 keyboard serial data input
 	 
-	 // interrupt signa
+	 // interrupt signal
 	 input INT_n,
 
     // video outputs