diff -Nur chkrootkit-0.45-orig/chkproc.c chkrootkit-0.45/chkproc.c
--- chkrootkit-0.45-orig/chkproc.c	2004-09-13 20:39:29.000000000 +0200
+++ chkrootkit-0.45/chkproc.c	2005-03-17 16:48:48.000000000 +0100
@@ -48,6 +48,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <signal.h>
+#include <string.h>
 #if defined(__sun)
 #include <procfs.h>
 #include <fcntl.h>
diff -Nur chkrootkit-0.45-orig/chkwtmp.c chkrootkit-0.45/chkwtmp.c
--- chkrootkit-0.45-orig/chkwtmp.c	2004-09-06 21:24:56.000000000 +0200
+++ chkrootkit-0.45/chkwtmp.c	2005-03-17 16:49:01.000000000 +0100
@@ -17,7 +17,7 @@
    Nelson Murilo, nelson@pangeia.com.br
 */
 
-
+#include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <string.h>
diff -Nur chkrootkit-0.48-orig/strings.c chkrootkit-0.48/strings.c
--- chkrootkit-0.48-orig/strings.c	2006-10-18 20:00:29.000000000 +0200
+++ chkrootkit-0.48/strings.c	2008-02-12 10:29:10.000000000 +0100
@@ -10,7 +10,7 @@
  */
 
 #include <stdio.h>
-#include <strings.h>
+#include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <ctype.h>