diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index d759a6677b..04a0c47fb0 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -1,3 +1,8 @@
+19990616-13:12 Alexander Kresin
+ updated:
+ * source\compiler\harbour.y
+  Added description of /p switch to PrintUsage()
+
 19990616-11:19 Alexander Kresin
  updated:
  * source\hbpp\hbppmain.c
diff --git a/harbour/source/compiler/harbour.y b/harbour/source/compiler/harbour.y
index c7d1f1eecc..16fc581117 100644
--- a/harbour/source/compiler/harbour.y
+++ b/harbour/source/compiler/harbour.y
@@ -1346,6 +1346,7 @@ void PrintUsage( char * szSelf )
           "\t/l\t\tsuppress line number information\n"
           "\t/n\t\tno implicit starting procedure\n"
           "\t/o<path>\tobject file drive and/or path\n"
+          "\t/p\t\tgenerate pre-processed output ( .ppo ) file\n"
           "\t/q\t\tquiet\n"
           "\t/s\t\tsyntax check only\n"
           "\t/t\t\talternative method of symbol table initialization\n"