2 files changed, 3 insertions, 0 deletions
diff --git a/NEWS b/NEWS
index 2e13a83..74fddf3 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,7 @@ UNRELEASED
 
   - More node 6 compatibility fixes
   - Use own strftime code (drops strftime npm package dependency)
+  - Fix passing JavaScript strings to luaL_add(l)string
 
 
 0.1.1 - 2018-04-03
diff --git a/src/lauxlib.js b/src/lauxlib.js
index 2276bd0..9d414b2 100644
--- a/src/lauxlib.js
+++ b/src/lauxlib.js
@@ -482,6 +482,7 @@ const luaL_prepbuffer = function(B) {
 
 const luaL_addlstring = function(B, s, l) {
     if (l > 0) {
+        s = from_userstring(s);
         let b = luaL_prepbuffsize(B, l);
         b.set(s.subarray(0, l));
         luaL_addsize(B, l);
@@ -489,6 +490,7 @@ const luaL_addlstring = function(B, s, l) {
 };
 
 const luaL_addstring = function(B, s) {
+    s = from_userstring(s);
     luaL_addlstring(B, s, s.length);
 };