diff --git a/docs/CONTRIBUTORS b/docs/CONTRIBUTORS
index 0e81abaae..397daf3b0 100644
--- a/docs/CONTRIBUTORS
+++ b/docs/CONTRIBUTORS
@@ -16,6 +16,7 @@ Garrett Smith
 Geza Lore
 Gianfranco Costamagna
 Glen Gibb
+Harald Heckmann
 Howard Su
 Huang Rui
 Iztok Jeras
diff --git a/docs/install.adoc b/docs/install.adoc
index f9d8adba3..d3b13b244 100644
--- a/docs/install.adoc
+++ b/docs/install.adoc
@@ -89,7 +89,7 @@ To build or run the following are optional but should be installed for
 good performance:
 
    sudo apt-get install ccache  # If present at build, needed for run
-   sudo apt-get install libgoogle-perftools-dev numactl
+   sudo apt-get install libgoogle-perftools-dev numactl perl-doc
 
 To build Verilator you will need to install these packages; these do not
 need to be present to run Verilator: