diff --git a/docs/tools.txt b/docs/tools.txt
index 26d116d..fd3d41d 100755
--- a/docs/tools.txt
+++ b/docs/tools.txt
@@ -37,7 +37,7 @@ This documents the utilities included in the Apple II Pi project.  See the proje
 	
 	a2serclk	- Raspberry Pi GPCLK for Apple II Pi hardware
         a2pid           - Apple II Pi Linux daemon
-        A2Pi.PO
+        A2PI.PO
 
 3.0 Interactive Tools:
 ======================