diff --git a/src/common.h b/src/common.h
index c8fb54df..14bfe42b 100644
--- a/src/common.h
+++ b/src/common.h
@@ -6,7 +6,7 @@
 #define IRSSI_GLOBAL_CONFIG "irssi.conf" /* config file name in /etc/ */
 #define IRSSI_HOME_CONFIG "config" /* config file name in ~/.irssi/ */
 
-#define IRSSI_ABI_VERSION 18
+#define IRSSI_ABI_VERSION 19
 
 #define DEFAULT_SERVER_ADD_PORT 6667
 #define DEFAULT_SERVER_ADD_TLS_PORT 6697
diff --git a/src/irc/core/irc-cap.c b/src/irc/core/irc-cap.c
index 5ab8d94f..2d740c59 100644
--- a/src/irc/core/irc-cap.c
+++ b/src/irc/core/irc-cap.c
@@ -24,7 +24,7 @@
 #include "irc-cap.h"
 #include "irc-servers.h"
 
-int cap_toggle (IRC_SERVER_REC *server, char *cap, int enable)
+int irc_cap_toggle (IRC_SERVER_REC *server, char *cap, int enable)
 {
 	if (cap == NULL || *cap == '\0')
 		return FALSE;
@@ -65,7 +65,7 @@ int cap_toggle (IRC_SERVER_REC *server, char *cap, int enable)
 	return FALSE;
 }
 
-void cap_finish_negotiation (IRC_SERVER_REC *server)
+void irc_cap_finish_negotiation (IRC_SERVER_REC *server)
 {
 	if (server->cap_complete)
 		return;
@@ -130,7 +130,7 @@ static void event_cap (IRC_SERVER_REC *server, char *args, char *nick, char *add
 	}
 	/* Malformed request, terminate the negotiation */
 	else {
-		cap_finish_negotiation(server);
+		irc_cap_finish_negotiation(server);
 		g_warn_if_reached();
 		return;
 	}
@@ -177,7 +177,7 @@ static void event_cap (IRC_SERVER_REC *server, char *args, char *nick, char *add
 		if (multiline == FALSE) {
 			/* No CAP has been requested */
 			if (server->cap_queue == NULL) {
-				cap_finish_negotiation(server);
+				irc_cap_finish_negotiation(server);
 			}
 			else {
 				cmd = g_string_new("CAP REQ :");
@@ -204,7 +204,7 @@ static void event_cap (IRC_SERVER_REC *server, char *args, char *nick, char *add
 					signal_emit("server cap req", 2, server, cmd->str + sizeof("CAP REQ :") - 1);
 					irc_send_cmd_now(server, cmd->str);
 				} else {
-					cap_finish_negotiation(server);
+					irc_cap_finish_negotiation(server);
 				}
 
 				g_string_free(cmd, TRUE);
@@ -233,7 +233,7 @@ static void event_cap (IRC_SERVER_REC *server, char *args, char *nick, char *add
 		 * negotiation, unless sasl was requested. In this case we must not terminate the negotiation
 		 * until the sasl handshake is over. */
 		if (got_sasl == FALSE)
-			cap_finish_negotiation(server);
+			irc_cap_finish_negotiation(server);
 	}
 	else if (!g_ascii_strcasecmp(evt, "NAK")) {
 		g_warning("The server answered with a NAK to our CAP request, this should not happen");
@@ -296,13 +296,13 @@ static void event_invalid_cap (IRC_SERVER_REC *server, const char *data, const c
 	irc_send_cmd_now(server, "CAP END");
 }
 
-void cap_init (void)
+void irc_cap_init (void)
 {
 	signal_add_first("event cap", (SIGNAL_FUNC) event_cap);
 	signal_add_first("event 410", (SIGNAL_FUNC) event_invalid_cap);
 }
 
-void cap_deinit (void)
+void irc_cap_deinit (void)
 {
 	signal_remove("event cap", (SIGNAL_FUNC) event_cap);
 	signal_remove("event 410", (SIGNAL_FUNC) event_invalid_cap);
diff --git a/src/irc/core/irc-cap.h b/src/irc/core/irc-cap.h
index df957cd2..96efbbee 100644
--- a/src/irc/core/irc-cap.h
+++ b/src/irc/core/irc-cap.h
@@ -1,9 +1,9 @@
 #ifndef __IRC_CAP_H
 #define __IRC_CAP_H
 
-void cap_init(void);
-void cap_deinit(void);
-int cap_toggle (IRC_SERVER_REC *server, char *cap, int enable);
-void cap_finish_negotiation (IRC_SERVER_REC *server);
+void irc_cap_init(void);
+void irc_cap_deinit(void);
+int irc_cap_toggle (IRC_SERVER_REC *server, char *cap, int enable);
+void irc_cap_finish_negotiation (IRC_SERVER_REC *server);
 
 #endif
diff --git a/src/irc/core/irc-core.c b/src/irc/core/irc-core.c
index a9221e02..950e5029 100644
--- a/src/irc/core/irc-core.c
+++ b/src/irc/core/irc-core.c
@@ -119,7 +119,7 @@ void irc_core_init(void)
 	lag_init();
 	netsplit_init();
 	irc_expandos_init();
-	cap_init();
+	irc_cap_init();
 	sasl_init();
 
 	settings_check();
@@ -131,7 +131,7 @@ void irc_core_deinit(void)
 	signal_emit("chat protocol deinit", 1, chat_protocol_find("IRC"));
 
 	sasl_deinit();
-	cap_deinit();
+	irc_cap_deinit();
 	irc_expandos_deinit();
 	netsplit_deinit();
 	lag_deinit();
diff --git a/src/irc/core/irc-servers.c b/src/irc/core/irc-servers.c
index 02d971dc..03c73312 100644
--- a/src/irc/core/irc-servers.c
+++ b/src/irc/core/irc-servers.c
@@ -236,9 +236,9 @@ static void server_init(IRC_SERVER_REC *server)
 	}
 
 	if (conn->sasl_mechanism != SASL_MECHANISM_NONE)
-		cap_toggle(server, "sasl", TRUE);
+		irc_cap_toggle(server, "sasl", TRUE);
 
-	cap_toggle(server, "multi-prefix", TRUE);
+	irc_cap_toggle(server, "multi-prefix", TRUE);
 
 	irc_send_cmd_now(server, "CAP LS");
 
diff --git a/src/irc/core/sasl.c b/src/irc/core/sasl.c
index b7abe748..92eb6244 100644
--- a/src/irc/core/sasl.c
+++ b/src/irc/core/sasl.c
@@ -45,7 +45,7 @@ static gboolean sasl_timeout(IRC_SERVER_REC *server)
 {
 	/* The authentication timed out, we can't do much beside terminating it */
 	irc_send_cmd_now(server, "AUTHENTICATE *");
-	cap_finish_negotiation(server);
+	irc_cap_finish_negotiation(server);
 
 	server->sasl_timeout = 0;
 	server->sasl_success = FALSE;
@@ -96,7 +96,7 @@ static void sasl_fail(IRC_SERVER_REC *server, const char *data, const char *from
 	signal_emit("server sasl failure", 2, server, error);
 
 	/* Terminate the negotiation */
-	cap_finish_negotiation(server);
+	irc_cap_finish_negotiation(server);
 
 	g_free(params);
 }
@@ -110,7 +110,7 @@ static void sasl_already(IRC_SERVER_REC *server, const char *data, const char *f
 	signal_emit("server sasl success", 1, server);
 
 	/* We're already authenticated, do nothing */
-	cap_finish_negotiation(server);
+	irc_cap_finish_negotiation(server);
 }
 
 static void sasl_success(IRC_SERVER_REC *server, const char *data, const char *from)
@@ -122,7 +122,7 @@ static void sasl_success(IRC_SERVER_REC *server, const char *data, const char *f
 	signal_emit("server sasl success", 1, server);
 
 	/* The authentication succeeded, time to finish the CAP negotiation */
-	cap_finish_negotiation(server);
+	irc_cap_finish_negotiation(server);
 }
 
 /*
@@ -263,7 +263,7 @@ static void sasl_step_complete(IRC_SERVER_REC *server, GString *data)
 static void sasl_step_fail(IRC_SERVER_REC *server)
 {
 	irc_send_cmd_now(server, "AUTHENTICATE *");
-	cap_finish_negotiation(server);
+	irc_cap_finish_negotiation(server);
 
 	sasl_timeout_stop(server);
 
diff --git a/src/perl/irc/Server.xs b/src/perl/irc/Server.xs
index 33417bf5..a42f5c82 100644
--- a/src/perl/irc/Server.xs
+++ b/src/perl/irc/Server.xs
@@ -155,6 +155,6 @@ irc_server_cap_toggle(server, cap, enable)
 	char *cap
 	int enable
 CODE:
-	RETVAL = cap_toggle(server, cap, enable);
+	RETVAL = irc_cap_toggle(server, cap, enable);
 OUTPUT:
 	RETVAL