1 files changed, 1 insertions, 0 deletions
diff --git a/README b/README
index ec27db1ab..82f6edc55 100644
--- a/README
+++ b/README
@@ -22,6 +22,7 @@ Before you can start you need to install some tools:
 - ncurses5 headers
 - zlib headers
 - perl
+- bc
 
 There is a check for the required versions of these tools in advance, though.
 (to re-issue the checks, use "make prereq").