diff --git a/README.md b/README.md
index f3b21ed1..a624c615 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ toolchain.
 Several standard packages are needed to build the toolchain.  On Ubuntu,
 executing the following command should suffice:
 
-    $ sudo apt-get install autoconf automake autotools-dev curl libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils
+    $ sudo apt-get install autoconf automake autotools-dev curl libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc
 
 On Fedora/CentOS/RHEL OS, executing the following command should suffice: