diff --git a/src/auth.c b/src/auth.c
index a9ebd3fc..7f47b5e4 100644
--- a/src/auth.c
+++ b/src/auth.c
@@ -580,7 +580,7 @@ void auth_stream_end (mount_proxy *mountinfo, const char *mount)
 
 /* these are called at server start and termination */
 
-void auth_initialise ()
+void auth_initialise (void)
 {
     clients_to_auth = NULL;
     auth_pending_count = 0;
@@ -589,7 +589,7 @@ void auth_initialise ()
     auth_thread = thread_create ("auth thread", auth_run_thread, NULL, THREAD_ATTACHED);
 }
 
-void auth_shutdown ()
+void auth_shutdown (void)
 {
     if (auth_thread)
     {
diff --git a/src/auth.h b/src/auth.h
index 0e023b67..12c6916a 100644
--- a/src/auth.h
+++ b/src/auth.h
@@ -77,8 +77,8 @@ typedef struct auth_tag
 void add_client (const char *mount, client_t *client);
 int  release_client (client_t *client);
 
-void auth_initialise ();
-void auth_shutdown ();
+void auth_initialise (void);
+void auth_shutdown (void);
 
 auth_t  *auth_get_authenticator (xmlNodePtr node);
 void    auth_release (auth_t *authenticator);
diff --git a/src/cfgfile.c b/src/cfgfile.c
index 7e761f1b..fdaccacd 100644
--- a/src/cfgfile.c
+++ b/src/cfgfile.c
@@ -86,12 +86,12 @@ static void _parse_listen_socket(xmlDocPtr doc, xmlNodePtr node,
         ice_config_t *c);
 static void _add_server(xmlDocPtr doc, xmlNodePtr node, ice_config_t *c);
 
-static void create_locks() {
+static void create_locks(void) {
     thread_mutex_create(&_locks.relay_lock);
     thread_rwlock_create(&_locks.config_lock);
 }
 
-static void release_locks() {
+static void release_locks(void) {
     thread_mutex_destroy(&_locks.relay_lock);
     thread_rwlock_destroy(&_locks.config_lock);
 }
diff --git a/src/connection.c b/src/connection.c
index 62557695..f5924ffd 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -313,7 +313,7 @@ static client_queue_t *_get_connection(void)
 
 
 /* run along queue checking for any data that has come in or a timeout */
-static void process_request_queue ()
+static void process_request_queue (void)
 {
     client_queue_t **node_ref = (client_queue_t **)&_req_queue;
     ice_config_t *config = config_get_config ();
diff --git a/src/fserve.c b/src/fserve.c
index c80c0728..0a8cffee 100644
--- a/src/fserve.c
+++ b/src/fserve.c
@@ -201,7 +201,7 @@ int fserve_client_waiting (void)
 }
 #endif
 
-static void wait_for_fds() {
+static void wait_for_fds(void) {
     fserve_t *fclient;
 
     while (run_fserv)
diff --git a/src/main.c b/src/main.c
index 401f3059..4ea1157a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -75,7 +75,7 @@ static void _fatal_error(char *perr)
 #endif
 }
 
-static void _print_usage()
+static void _print_usage(void)
 {
     printf(ICECAST_VERSION_STRING "\n\n");
     printf("usage: icecast [-b -v] -c <file>\n");
diff --git a/src/stats.c b/src/stats.c
index a7a2118f..98591f75 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -119,7 +119,7 @@ static void queue_global_event (stats_event_t *event)
     thread_mutex_unlock(&_global_event_mutex);
 }
 
-void stats_initialize()
+void stats_initialize(void)
 {
     _event_listeners = NULL;
 
@@ -139,7 +139,7 @@ void stats_initialize()
     _stats_thread_id = thread_create("Stats Thread", _stats_thread, NULL, THREAD_ATTACHED);
 }
 
-void stats_shutdown()
+void stats_shutdown(void)
 {
     int n;
 
@@ -182,7 +182,7 @@ void stats_shutdown()
     }
 }
 
-stats_t *stats_get_stats()
+stats_t *stats_get_stats(void)
 {
     /* lock global stats
     
diff --git a/src/stats.h b/src/stats.h
index 45ca5920..eedb550a 100644
--- a/src/stats.h
+++ b/src/stats.h
@@ -70,10 +70,10 @@ typedef struct _stats_tag
 
 } stats_t;
 
-void stats_initialize();
-void stats_shutdown();
+void stats_initialize(void);
+void stats_shutdown(void);
 
-stats_t *stats_get_stats();
+stats_t *stats_get_stats(void);
 
 void stats_event(const char *source, const char *name, const char *value);
 void stats_event_args(const char *source, char *name, char *format, ...);
diff --git a/src/xslt.c b/src/xslt.c
index 4dcfecb7..3ba80d7a 100644
--- a/src/xslt.c
+++ b/src/xslt.c
@@ -94,7 +94,7 @@ int xsltSaveResultToString(xmlChar **doc_txt_ptr, int * doc_txt_len, xmlDocPtr r
 static stylesheet_cache_t cache[CACHESIZE];
 static mutex_t xsltlock;
 
-void xslt_initialize()
+void xslt_initialize(void)
 {
     xmlSubstituteEntitiesDefault(1);
     xmlLoadExtDtdDefaultValue = 1;
@@ -105,7 +105,7 @@ void xslt_initialize()
     xmlLoadExtDtdDefaultValue = 1;
 }
 
-void xslt_shutdown() {
+void xslt_shutdown(void) {
     int i;
 
     for(i=0; i < CACHESIZE; i++) {
@@ -119,7 +119,7 @@ void xslt_shutdown() {
     xsltCleanupGlobals();
 }
 
-static int evict_cache_entry() {
+static int evict_cache_entry(void) {
     int i, age=0, oldest=0;
 
     for(i=0; i < CACHESIZE; i++) {
diff --git a/src/xslt.h b/src/xslt.h
index a88938a4..6fe54e71 100644
--- a/src/xslt.h
+++ b/src/xslt.h
@@ -35,6 +35,6 @@
 
 
 void xslt_transform(xmlDocPtr doc, const char *xslfilename, client_t *client);
-void xslt_initialize();
-void xslt_shutdown();
+void xslt_initialize(void);
+void xslt_shutdown(void);
 
diff --git a/src/yp.c b/src/yp.c
index e42eb124..de4f36af 100644
--- a/src/yp.c
+++ b/src/yp.c
@@ -265,7 +265,7 @@ void yp_recheck_config (ice_config_t *config)
 }
 
 
-void yp_initialize()
+void yp_initialize(void)
 {
     ice_config_t *config = config_get_config();
     thread_rwlock_create (&yp_lock);
@@ -562,7 +562,7 @@ static ypdata_t *create_yp_entry (const char *mount)
 
 
 /* Check for changes in the YP servers configured */
-static void check_servers ()
+static void check_servers (void)
 {
     struct yp_server *server = (struct yp_server *)active_yps,
                      **server_p = (struct yp_server **)&active_yps;
@@ -916,7 +916,7 @@ void yp_touch (const char *mount)
 }
 
 
-void yp_shutdown ()
+void yp_shutdown (void)
 {
     yp_running = 0;
     yp_update = 1;
diff --git a/src/yp.h b/src/yp.h
index 896b5bbf..6b2eb187 100644
--- a/src/yp.h
+++ b/src/yp.h
@@ -32,8 +32,8 @@ void yp_add (const char *mount);
 void yp_remove (const char *mount);
 void yp_touch (const char *mount);
 void yp_recheck_config (ice_config_t *config);
-void yp_initialize();
-void yp_shutdown();
+void yp_initialize(void);
+void yp_shutdown(void);
 
 #else