--- rootinterface/pythia6_common_address.c.orig	2020-11-12 14:07:37.000000000 +0100
+++ rootinterface/pythia6_common_address.c	2020-11-12 14:08:54.000000000 +0100
@@ -1,4 +1,5 @@
 // declaration of PYTHIA6 common clocks
+# include <string.h>
 #ifndef WIN32
 # define pyjets pyjets_
 # define pydat1 pydat1_