diff --git a/first/ack-custom.pm b/first/ack-custom.pm
index 529c9f046..a6b000dc4 100644
--- a/first/ack-custom.pm
+++ b/first/ack-custom.pm
@@ -7,12 +7,15 @@ preprocess = simple {
 	class = "preprocess",
 	outputs = {"%U%-%I%"},
 	command = {
-		"%BINDIR%bin/cpp -I%HEADERDIR% %in% > %out[1]%"
+		"cpp -I%HEADERDIR% %in% > %out[1]%"
 	}
 }
 
 -- Revision history
 -- $Log$
--- Revision 1.1  2006-07-22 00:49:48  dtrg
+-- Revision 1.2  2007-02-20 00:32:58  dtrg
+-- Changed the 'preprocess' rule to use the system C preprocessor.
+--
+-- Revision 1.1  2006/07/22 00:49:48  dtrg
 -- First version in CVS.
 --