--- a/sn_cfgfile.h
+++ b/sn_cfgfile.h
@@ -10,3 +10,4 @@
 void make_nr_dot (char *);
 void interprete_line (char *);
 void read_cfg_file (char *);    
+char *strlower (char *);
--- a/sn_structs.h
+++ b/sn_structs.h
@@ -67,7 +67,7 @@
 struct snif_mask                                         /* struct for mask */
   {
   _32_bit source_ip, destination_ip;
-  _32_bit short source_port, destination_port;
+  _32_bit source_port, destination_port;
   };
 
 /* (packet generation) */
--- a/sn_analyse.c
+++ b/sn_analyse.c
@@ -1,6 +1,9 @@
 /* Analyse traffic for logging mode                                      */
 /*   - by: Brecht Claerhout                                              */
 
+#include <stdlib.h>
+#include <string.h>
+
 const unsigned char *data;
 memcpy(&tcphead,header,sizeof(struct TCP_header));
 	  	
--- a/sn_cfgfile.c
+++ b/sn_cfgfile.c
@@ -3,6 +3,11 @@
 /*   - improvements: Shudoh Kazuyuki                                      */
 
 #include <stdio.h>
+#include <stdlib.h>
+#include "sn_interface.h"
+#include <string.h>
+#include <ctype.h>
+#include <time.h>
 #include <netdb.h>	                           /* for getservbyname() */
 
 #include "sn_config.h"
--- a/sn_conn_desc.c
+++ b/sn_conn_desc.c
@@ -1,6 +1,8 @@
 /* Connection description detection file                                 */
 /*   - by: Brecht Claerhout                                              */
 
+#include <ctype.h>
+#include <string.h>
 
 /* Simple PORT BASED detection */
 
--- a/sn_generation.c
+++ b/sn_generation.c
@@ -6,12 +6,16 @@
 #ifdef INCLUDE_INTERFACE
 #ifdef GENERATION
 #include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/socket.h>
 #include <netinet/in.h>     
 #include "sn_curses.h"
 #include "sn_defines.h"
 #include "sn_structs.h"
 #include "sn_generation.h"  
+#include "sn_interface.h" /* input_field() */
+#include "sn_packets.h" /* in_cksum() */
 
 extern volatile int screen_busy;
 
--- a/sniffit.0.3.7.c
+++ b/sniffit.0.3.7.c
@@ -4,6 +4,9 @@
 #include "sn_config.h"		/* Config header file */
 
 #include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
 #include <signal.h>
 #include <stdio.h>
 #include <fcntl.h>
--- a/sn_interface.c
+++ b/sn_interface.c
@@ -6,6 +6,9 @@
 #ifdef INCLUDE_INTERFACE
 #include <signal.h>
 #include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
 #include <sys/ipc.h>
 #include <sys/shm.h>       
 #include "sn_curses.h" 
--- a/sn_logfile.c
+++ b/sn_logfile.c
@@ -4,6 +4,9 @@
 #include "sn_config.h"
 
 #include <stdio.h>
+#include <stdlib.h> /* exit() */
+#include <string.h> /* strcpy() */
+#include <time.h> /* time() ctime() */
 #include <sys/stat.h>
 #include <sys/time.h>
 #include "sn_defines.h"
--- a/sn_packets.c
+++ b/sn_packets.c
@@ -5,6 +5,7 @@
 #include "sn_defines.h"
 #include "sn_structs.h"
 #include <netinet/in.h>
+#include <string.h> /* memcpy() strcpy() */
 
 extern int PROTO_HEAD;
 extern char NO_CHKSUM;