diff --git a/.travis.yml b/.travis.yml
index c8bbb6d8..46f58766 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,5 +22,5 @@ install: true
 script:
     - ./autogen.sh --with-proxy --with-bot --with-perl=module --prefix=$HOME/irssi-build
     - cat config.log
-    - make
+    - make CFLAGS="-Wall -Werror"
     - make install
diff --git a/src/core/settings.c b/src/core/settings.c
index b34a5766..8e493124 100644
--- a/src/core/settings.c
+++ b/src/core/settings.c
@@ -59,7 +59,7 @@ static SETTINGS_REC *settings_get(const char *key, SettingType type)
 		g_warning("settings_get(%s) : not found", key);
 		return NULL;
 	}
-	if (type != -1 && rec->type != type) {
+	if (type != SETTING_TYPE_ANY && rec->type != type) {
 		g_warning("settings_get(%s) : invalid type", key);
 		return NULL;
 	}
@@ -85,7 +85,7 @@ settings_get_str_type(const char *key, SettingType type)
 
 const char *settings_get_str(const char *key)
 {
-	return settings_get_str_type(key, -1);
+	return settings_get_str_type(key, SETTING_TYPE_ANY);
 }
 
 int settings_get_int(const char *key)
@@ -163,6 +163,7 @@ char *settings_get_print(SETTINGS_REC *rec)
 	case SETTING_TYPE_TIME:
 	case SETTING_TYPE_LEVEL:
 	case SETTING_TYPE_SIZE:
+	case SETTING_TYPE_ANY:
 		value = g_strdup(settings_get_str(rec->key));
 		break;
 	}
@@ -380,10 +381,10 @@ SettingType settings_get_type(const char *key)
 {
 	SETTINGS_REC *rec;
 
-	g_return_val_if_fail(key != NULL, -1);
+	g_return_val_if_fail(key != NULL, SETTING_TYPE_ANY);
 
 	rec = g_hash_table_lookup(settings, key);
-	return rec == NULL ? -1 : rec->type;
+	return rec == NULL ? SETTING_TYPE_ANY : rec->type;
 }
 
 /* Get the record of the setting */
diff --git a/src/core/settings.h b/src/core/settings.h
index af00cc80..6f2cf129 100644
--- a/src/core/settings.h
+++ b/src/core/settings.h
@@ -7,7 +7,8 @@ typedef enum {
 	SETTING_TYPE_BOOLEAN,
 	SETTING_TYPE_TIME,
 	SETTING_TYPE_LEVEL,
-	SETTING_TYPE_SIZE
+	SETTING_TYPE_SIZE,
+	SETTING_TYPE_ANY
 } SettingType;
 
 typedef struct {
diff --git a/src/fe-common/core/completion.c b/src/fe-common/core/completion.c
index 312e417c..4461de92 100644
--- a/src/fe-common/core/completion.c
+++ b/src/fe-common/core/completion.c
@@ -362,8 +362,7 @@ static GList *completion_get_settings(const char *key, SettingType type)
 	for (tmp = sets; tmp != NULL; tmp = tmp->next) {
 		SETTINGS_REC *rec = tmp->data;
 
-		if ((type == -1 || rec->type == type) &&
-		    g_ascii_strncasecmp(rec->key, key, len) == 0)
+		if ((type == SETTING_TYPE_ANY || rec->type == type) && g_ascii_strncasecmp(rec->key, key, len) == 0)
 			complist = g_list_insert_sorted(complist, g_strdup(rec->key), (GCompareFunc) g_istr_cmp);
 	}
 	g_slist_free(sets);
@@ -682,7 +681,7 @@ static void sig_complete_set(GList **list, WINDOW_REC *window,
 
 	if (*line == '\0' ||
 	    !g_strcmp0("-clear", line) || !g_strcmp0("-default", line))
-		*list = completion_get_settings(word, -1);
+		*list = completion_get_settings(word, SETTING_TYPE_ANY);
 	else if (*line != '\0' && *word == '\0') {
 		SETTINGS_REC *rec = settings_get_record(line);
 		if (rec != NULL) {
diff --git a/src/fe-common/core/fe-settings.c b/src/fe-common/core/fe-settings.c
index 9c370838..2627989d 100644
--- a/src/fe-common/core/fe-settings.c
+++ b/src/fe-common/core/fe-settings.c
@@ -126,7 +126,7 @@ static void cmd_set(char *data)
 			/* change the setting */
 			switch (rec->type) {
 			case SETTING_TYPE_BOOLEAN:
-                                if (clear)
+				if (clear)
 					settings_set_bool(key, FALSE);
 				else if (set_default)
 					settings_set_bool(key, rec->default_value.v_bool);
@@ -149,32 +149,30 @@ static void cmd_set(char *data)
 			case SETTING_TYPE_TIME:
 				if (!settings_set_time(key, clear ? "0" :
 						       set_default ? rec->default_value.v_string : value))
-					printformat(NULL, NULL, MSGLEVEL_CLIENTERROR,
-						    TXT_INVALID_TIME);
+					printformat(NULL, NULL, MSGLEVEL_CLIENTERROR, TXT_INVALID_TIME);
 				break;
 			case SETTING_TYPE_LEVEL:
 				if (!settings_set_level(key, clear ? "" :
 							set_default ? rec->default_value.v_string : value))
-					printformat(NULL, NULL, MSGLEVEL_CLIENTERROR,
-						    TXT_INVALID_LEVEL);
+					printformat(NULL, NULL, MSGLEVEL_CLIENTERROR, TXT_INVALID_LEVEL);
 				break;
 			case SETTING_TYPE_SIZE:
 				if (!settings_set_size(key, clear ? "0" :
 						       set_default ? rec->default_value.v_string : value))
-					printformat(NULL, NULL, MSGLEVEL_CLIENTERROR,
-						    TXT_INVALID_SIZE);
+					printformat(NULL, NULL, MSGLEVEL_CLIENTERROR, TXT_INVALID_SIZE);
+				break;
+			case SETTING_TYPE_ANY:
+				/* Unpossible! */
 				break;
 			}
 			signal_emit("setup changed", 0);
-			printformat(NULL, NULL, MSGLEVEL_CLIENTCRAP,
-				    TXT_SET_TITLE, rec->section);
+			printformat(NULL, NULL, MSGLEVEL_CLIENTCRAP, TXT_SET_TITLE, rec->section);
 			set_print(rec);
 		} else
-			printformat(NULL, NULL, MSGLEVEL_CLIENTERROR,
-				    TXT_SET_UNKNOWN, key);
+			printformat(NULL, NULL, MSGLEVEL_CLIENTERROR, TXT_SET_UNKNOWN, key);
 	}
 
-        cmd_params_free(free_arg);
+	cmd_params_free(free_arg);
 }
 
 /* SYNTAX: TOGGLE <key> [on|off|toggle] */
@@ -187,20 +185,21 @@ static void cmd_toggle(const char *data)
 	if (!cmd_get_params(data, &free_arg, 2 | PARAM_FLAG_GETREST, &key, &value))
 		return;
 
-        if (*key == '\0') cmd_param_error(CMDERR_NOT_ENOUGH_PARAMS);
+	if (*key == '\0')
+		cmd_param_error(CMDERR_NOT_ENOUGH_PARAMS);
 
 	type = settings_get_type(key);
-        if (type == -1)
+	if (type == SETTING_TYPE_ANY)
 		printformat(NULL, NULL, MSGLEVEL_CLIENTERROR, TXT_SET_UNKNOWN, key);
 	else if (type != SETTING_TYPE_BOOLEAN)
 		printformat(NULL, NULL, MSGLEVEL_CLIENTERROR, TXT_SET_NOT_BOOLEAN, key);
 	else {
 		set_boolean(key, *value != '\0' ? value : "TOGGLE");
-                set_print(settings_get_record(key));
+		set_print(settings_get_record(key));
 		signal_emit("setup changed", 0);
 	}
 
-        cmd_params_free(free_arg);
+	cmd_params_free(free_arg);
 }
 
 static int config_key_compare(CONFIG_NODE *node1, CONFIG_NODE *node2)
diff --git a/src/fe-text/gui-entry.c b/src/fe-text/gui-entry.c
index b7d58019..a83bcf64 100644
--- a/src/fe-text/gui-entry.c
+++ b/src/fe-text/gui-entry.c
@@ -35,21 +35,21 @@ static unichar i_toupper(unichar c)
 {
 	if (term_type == TERM_TYPE_UTF8)
 		return g_unichar_toupper(c);
-	return (c >= 0 && c <= 255) ? toupper(c) : c;
+	return c <= 255 ? toupper(c) : c;
 }
 
 static unichar i_tolower(unichar c)
 {
 	if (term_type == TERM_TYPE_UTF8)
 		return g_unichar_tolower(c);
-	return (c >= 0 && c <= 255) ? tolower(c) : c;
+	return c <= 255 ? tolower(c) : c;
 }
 
 static int i_isalnum(unichar c)
 {
 	if (term_type == TERM_TYPE_UTF8)
 		return (g_unichar_isalnum(c) || mk_wcwidth(c) == 0);
-	return (c >= 0 && c <= 255) ? isalnum(c) : 0;
+	return c <= 255 ? isalnum(c) : 0;
 }
 
 GUI_ENTRY_REC *active_entry;
diff --git a/src/fe-text/gui-readline.c b/src/fe-text/gui-readline.c
index 4d645748..c21925db 100644
--- a/src/fe-text/gui-readline.c
+++ b/src/fe-text/gui-readline.c
@@ -1023,6 +1023,8 @@ void gui_readline_init(void)
 	key_bind("key", NULL, "meta2-5F", "cend", (SIGNAL_FUNC) key_combo);
 	key_bind("key", NULL, "meta2-1;5F", "cend", (SIGNAL_FUNC) key_combo);
 
+	key_bind("key", NULL, "meta-O-M", "return", (SIGNAL_FUNC) key_combo);
+
 	/* cursor movement */
 	key_bind("backward_character", "Move the cursor a character backward", "left", NULL, (SIGNAL_FUNC) key_backward_character);
 	key_bind("forward_character", "Move the cursor a character forward", "right", NULL, (SIGNAL_FUNC) key_forward_character);