diff --git a/src/p7os/main.c b/src/p7os/main.c
index 8048242..d1d73db 100644
--- a/src/p7os/main.c
+++ b/src/p7os/main.c
@@ -32,10 +32,8 @@ static const char error_unplanned[] =
 
 /* Unsupported operation -> OS Update, not receive mode! */
 static const char error_unsupported[] =
-"Required operation was unsupported.\n"
-"- If you were using anything else than the *prepare* subcommand, are you\n"
-"  sure you've run *prepare* before?\n"
-"- Otherwise, I gotta be honest, I'd like to know how you've managed that.\n";
+"Required operation was unsupported by the calculator.\n"
+"If you did not prepare, perhaps you should prepare?\n";
 
 /* ************************************************************************** */
 /*  Main function                                                             */