diff -Naur wmSMPmon-3.1.orig/wmgeneral/wmgeneral.h wmSMPmon-3.1/wmgeneral/wmgeneral.h
--- wmSMPmon-3.1.orig/wmgeneral/wmgeneral.h	1999-04-25 05:08:22.000000000 +0200
+++ wmSMPmon-3.1/wmgeneral/wmgeneral.h	2020-03-29 13:32:55.253627166 +0200
@@ -36,7 +36,7 @@
  /* Global variable */
 /*******************/
 
-Display		*display;
+extern Display		*display;
 
   /***********************/
  /* Function Prototypes */
diff -Naur wmSMPmon-3.1.orig/wmSMPmon/standards.h wmSMPmon-3.1/wmSMPmon/standards.h
--- wmSMPmon-3.1.orig/wmSMPmon/standards.h	2004-11-19 14:57:30.000000000 +0100
+++ wmSMPmon-3.1/wmSMPmon/standards.h	2020-03-29 13:32:14.666639432 +0200
@@ -37,7 +37,7 @@
 #define	HAUTEUR  31 /* Max. height of CPU Load Bar+Graph */
 
 /* Program name used in error messages */
-char *Myname;
+extern char *Myname;
 
 /* NumCPUs_DoInit returns the number of CPUs present in the system and
    performs any initialization necessary for the sysinfo-XXX module */
diff -Naur wmSMPmon-3.1.orig/wmSMPmon/wmSMPmon.c wmSMPmon-3.1/wmSMPmon/wmSMPmon.c
--- wmSMPmon-3.1.orig/wmSMPmon/wmSMPmon.c	2005-11-07 01:24:32.000000000 +0100
+++ wmSMPmon-3.1/wmSMPmon/wmSMPmon.c	2020-03-29 13:33:03.630624637 +0200
@@ -35,6 +35,8 @@
 /*###### Funcition definitions ##########################################*/
 void usage(int cpus, const char *str);
 
+char *Myname;
+Display *display;
 
 /*###### MAIN PROGRAM ###################################################*/
 int main(int argc, char **argv)