diff --git a/README.md b/README.md
index f4fae436..74a38166 100644
--- a/README.md
+++ b/README.md
@@ -248,11 +248,11 @@ Concretely, here are the requisite packages in some Linux distributions:
 
 * On Ubuntu 16.04 LTS:
 
-        $ sudo apt-get install build-essential cmake git libgmp3-dev libprocps4-dev python-markdown libboost-all-dev libssl-dev
+        $ sudo apt-get install build-essential cmake git libgmp3-dev libprocps4-dev python-markdown libboost-all-dev libssl-dev pkg-config
 
 * On Ubuntu 14.04 LTS:
 
-        $ sudo apt-get install build-essential cmake git libgmp3-dev libprocps3-dev python-markdown libboost-all-dev libssl-dev
+        $ sudo apt-get install build-essential cmake git libgmp3-dev libprocps3-dev python-markdown libboost-all-dev libssl-dev pkg-config
 
 * On Fedora 21 through 23: