diff --git a/libs/ruamoko/rua_string.c b/libs/ruamoko/rua_string.c
index 1caa34ee4..1a532b575 100644
--- a/libs/ruamoko/rua_string.c
+++ b/libs/ruamoko/rua_string.c
@@ -69,6 +69,16 @@ bi_str_copy (progs_t *pr)
 	R_STRING (pr) = P_STRING (pr, 0);
 }
 
+static void
+bi_str_cat (progs_t *pr)
+{
+	dstring_t  *dst = P_DSTRING (pr, 0);
+	const char *src = P_GSTRING (pr, 1);
+
+	dstring_appendstr (dst, src);
+	R_STRING (pr) = P_STRING (pr, 0);
+}
+
 static void
 bi_str_clear (progs_t *pr)
 {
@@ -121,6 +131,7 @@ static builtin_t builtins[] = {
 	{"str_new",		bi_str_new,		-1},
 	{"str_free",	bi_str_free,	-1},
 	{"str_copy",	bi_str_copy,	-1},
+	{"str_cat",		bi_str_cat,		-1},
 	{"str_clear",	bi_str_clear,	-1},
 	{"str_mid|*i",	bi_str_mid,		-1},
 	{"str_mid|*ii",	bi_str_mid,		-1},
diff --git a/ruamoko/cl_menu/options.qc b/ruamoko/cl_menu/options.qc
index 11c3a76b7..9733a0de4 100644
--- a/ruamoko/cl_menu/options.qc
+++ b/ruamoko/cl_menu/options.qc
@@ -275,13 +275,16 @@ PLItem read_plist (void)
 {
 	local string plist_data, l;
 	local QFile file;
+	local PLItem plist;
 
 	file = QFS_OpenFile ("menu.plist");
-	plist_data = "";
+	plist_data = str_new ();
 	while ((l = Qgetline (file)))
 		plist_data += l;
 	Qclose (file);
-	return [PLItem newFromString:plist_data];
+	plist = [PLItem newFromString:plist_data];
+	str_free (plist_data);
+	return plist;
 }
 
 /*
diff --git a/ruamoko/include/string.h b/ruamoko/include/string.h
index 9f64f900f..b2d703eac 100644
--- a/ruamoko/include/string.h
+++ b/ruamoko/include/string.h
@@ -14,6 +14,7 @@
 @extern string (void) str_new;
 @extern string (string str) str_free;
 @extern string (string dst, string src) str_copy;
+@extern string (string dst, string src) str_cat;
 @extern string (string str) str_clear;
 @extern string (string str, integer start) @overload str_mid;
 @extern string (string str, integer start, integer len) @overload str_mid;
diff --git a/ruamoko/lib/string.r b/ruamoko/lib/string.r
index 97c0d20a3..b53260696 100644
--- a/ruamoko/lib/string.r
+++ b/ruamoko/lib/string.r
@@ -13,6 +13,7 @@ vector (string s) stov = #0x000f0000 + 114;
 string (void) str_new = #0;
 string (string str) str_free = #0;
 string (string dst, string src) str_copy = #0;
+string (string dst, string src) str_cat = #0;
 string (string str) str_clear = #0;
 string (string str, integer start) str_mid = #0;
 string (string str, integer start, integer len) str_mid = #0;