diff --git a/Source/HBIOS/dsky.asm b/Source/HBIOS/dsky.asm
index 35cf176d..fdf9c569 100644
--- a/Source/HBIOS/dsky.asm
+++ b/Source/HBIOS/dsky.asm
@@ -3,7 +3,7 @@
 ; DSKY (DISPLAY AND KEYBOARD) ROUTINES 
 ;==================================================================================================
 ;
-; THE DSKY MAY COSESIDE ON THE SAME PPI BUS AS A PPISD.  IT MAY NOT
+; THE DSKY MAY COINSIDE ON THE SAME PPI BUS AS A PPISD.  IT MAY NOT
 ; SHARE A PPI BUS WITH A PPIDE.  SEE PPI_BUS.TXT FOR MORE INFORMATION.
 ;
 ; LED SEGMENTS (BIT VALUES)