--- a/tp_as.c
+++ b/tp_as.c
@@ -50,6 +50,7 @@ static char * ra_service;
 static struct hostent * ra_hostent;
 static struct servent * ra_servent;
 
+char as_string[1024];
 
 int setup_as ( void )
 {
--- a/tp_as.h
+++ b/tp_as.h
@@ -33,7 +33,7 @@
 #ifndef TP_AS_H
 #define TP_AS_H 1
 
-char as_string[1024];
+extern char as_string[1024];
 
 /*! Initialisation function for AS lookups; returns 0 iff successful. */
 int setup_as(void);
--- a/tp_miscfunc.c
+++ b/tp_miscfunc.c
@@ -52,6 +52,8 @@
 #include <dmalloc.h>
 #endif /* HAVE_LIBDMALLOC */
 
+struct cleanup tixe_cleanup;
+
 /*
  * take a comma separated list (sans spaces) and give them a miss
  * (ie don't send probes with the ttl set to these numbers)
--- a/tp_miscfunc.h
+++ b/tp_miscfunc.h
@@ -32,7 +32,8 @@ struct cleanup {
 	unsigned int libnet_cleanup : 1;
 	unsigned int pcap_cleanup : 1;
 	unsigned int addrinfo_cleanup : 1;
-} tixe_cleanup;
+};
+extern struct cleanup tixe_cleanup;
 
 int parse_skips ( char * );
 
--- a/traceproto.c
+++ b/traceproto.c
@@ -55,6 +55,12 @@
 #include <dmalloc.h>
 #endif /* HAVE_LIBDMALLOC */
 
+struct tp_align_ref tp_align_freelist;
+struct behavior behavior;
+struct packet packet;
+struct state state;
+struct debug debug;
+
 int main( int argc, char * argv[] )
 {
 
--- a/traceproto.h
+++ b/traceproto.h
@@ -104,9 +104,10 @@ enum tp_tstamps {
 struct tp_align_ref {
 	struct tp_align_ref * next;
 	u_char * ref;
-} tp_align_freelist;
+};
+extern struct tp_align_ref tp_align_freelist;
 
-struct {
+struct behavior {
 	unsigned int continuous : 1;
 	unsigned int continuous_accounting : 1;
 	unsigned int do_skip : 1;
@@ -148,9 +149,10 @@ struct {
 	char timestamp_str [ TP_TIMESTAMP_LEN ];
 	char timestamp_style;
 	struct addrinfo hint;
-} behavior;
+};
+extern struct behavior behavior;
 
-struct {
+struct packet {
 	int dst_port;
 	int src_port;
 	int protocol_number;
@@ -161,9 +163,10 @@ struct {
 	long packed_src;
 	unsigned short frag_bit;
 	unsigned short ip_id;
-} packet;
+};
+extern struct packet packet;
 
-struct {
+struct state {
 	char * prog;
 	unsigned int account_hops;
 	struct hop_record {
@@ -208,9 +211,10 @@ struct {
 	unsigned int low_ttl;
 	unsigned int incr_error : 1;
 	unsigned int target_response : 1;
-} state;
+};
+extern struct state state;
 
-struct {
+struct debug {
 	unsigned int loop : 1;
 	unsigned int interface : 1;
 	unsigned int send_buf : 1;
@@ -219,6 +223,7 @@ struct {
 	unsigned int timestamp : 1;
 	unsigned int as_lookup : 1;
 	unsigned int memory : 1;
-} debug;
+};
+extern struct debug debug;
 
 #endif /* TRACEPROTO_H */