diff --git a/Home.md b/Home.md
index e27b653..efec156 100644
--- a/Home.md
+++ b/Home.md
@@ -5,6 +5,7 @@ The following Perl modules must be installed:
 * MULTICAST
 * CBC (for AES encryption)
 * Crypt::Cipher::AES (for AES encryption)
+* Math::Round
 
 `root@fhemdev:~# apt-get install libio-socket-multicast-perl`
 
@@ -12,6 +13,8 @@ The following Perl modules must be installed:
 
 `root@fhemdev:~# apt-get install libcrypt-cbc-perl`
 
+`root@fhemdev:~# apt-get install libmath-round-perl`
+
 `root@fhemdev:~# cpan Crypt::Cipher::AES`
 
 # Set Developermode on the gateway!