diff --git a/lib/emscripten/src/lib.rs b/lib/emscripten/src/lib.rs
index a96e263f6..ac5a4b282 100644
--- a/lib/emscripten/src/lib.rs
+++ b/lib/emscripten/src/lib.rs
@@ -76,6 +76,8 @@ lazy_static! {
 const GLOBAL_BASE: u32 = 1024;
 const STATIC_BASE: u32 = GLOBAL_BASE;
 
+use ::libc::DIR as libcDIR;
+
 pub struct EmscriptenData<'a> {
     pub malloc: Func<'a, u32, u32>,
     pub free: Func<'a, u32>,
@@ -83,6 +85,7 @@ pub struct EmscriptenData<'a> {
     pub memset: Func<'a, (u32, u32, u32), u32>,
     pub stack_alloc: Func<'a, u32, u32>,
     pub jumps: Vec<UnsafeCell<[u32; 27]>>,
+    pub opened_dirs: HashMap<i32, Box<*mut libcDIR>>,
 
     pub dyn_call_i: Option<Func<'a, i32, i32>>,
     pub dyn_call_ii: Option<Func<'a, (i32, i32), i32>>,
@@ -224,6 +227,8 @@ impl<'a> EmscriptenData<'a> {
             memset,
             stack_alloc,
             jumps: Vec::new(),
+            opened_dirs: HashMap::new(),
+
             dyn_call_i,
             dyn_call_ii,
             dyn_call_iii,
diff --git a/lib/emscripten/src/syscalls/mod.rs b/lib/emscripten/src/syscalls/mod.rs
index 052d773d9..88e382750 100644
--- a/lib/emscripten/src/syscalls/mod.rs
+++ b/lib/emscripten/src/syscalls/mod.rs
@@ -631,11 +631,6 @@ pub fn ___syscall218(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
     -1
 }
 
-pub fn ___syscall220(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
-    debug!("emscripten::___syscall220");
-    -1
-}
-
 // fcntl64
 pub fn ___syscall221(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
     debug!("emscripten::___syscall221 (fcntl64) {}", _which);
diff --git a/lib/emscripten/src/syscalls/unix.rs b/lib/emscripten/src/syscalls/unix.rs
index e5b3acb63..e6b2860c2 100644
--- a/lib/emscripten/src/syscalls/unix.rs
+++ b/lib/emscripten/src/syscalls/unix.rs
@@ -74,6 +74,8 @@ use libc::{
     SO_REUSEADDR,
     TIOCGWINSZ,
 };
+#[allow(unused_imports)]
+use std::ffi::CStr;
 use wasmer_runtime_core::vm::Ctx;
 
 use crate::utils;
@@ -849,19 +851,25 @@ pub fn ___syscall196(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
 // dirent structure is
 // i64, i64, u16 (280), i8, [i8; 256]
 pub fn ___syscall220(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
-    debug!("emscripten::___syscall220");
+    use super::super::env::get_emscripten_data;
+
     let fd: i32 = varargs.get(ctx);
     let dirp_addr: i32 = varargs.get(ctx);
     let count: u32 = varargs.get(ctx);
+    debug!("emscripten::___syscall220 (getdents) {} {} {}", fd, dirp_addr, count);
 
     let dirp = emscripten_memory_pointer!(ctx.memory(0), dirp_addr) as *mut u8;
+
+    let mut opened_dirs = &mut get_emscripten_data(ctx).opened_dirs;
+
     // need to persist stream across calls?
-    let dir: *mut libc::DIR = unsafe { libc::fdopendir(fd) };
+    // let dir: *mut libc::DIR = unsafe { libc::fdopendir(fd) };
+    let mut dir = &*opened_dirs.entry(fd).or_insert_with(|| unsafe { Box::new(libc::fdopendir(fd)) });
 
     let mut pos = 0;
     let offset = 280;
     while pos + offset <= count as usize {
-        let dirent = unsafe { readdir(dir) };
+        let dirent = unsafe { readdir(**dir) };
         if dirent.is_null() {
             break;
         }
@@ -878,6 +886,7 @@ pub fn ___syscall220(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
                 i += 1;
             }
             *(dirp.add(pos + 19 + i) as *mut i8) = 0 as i8;
+            debug!("  => file {}", CStr::from_ptr(dirp.add(pos + 19) as *const i8).to_str().unwrap());
         }
         pos += offset;
     }
diff --git a/lib/emscripten/src/unistd.rs b/lib/emscripten/src/unistd.rs
index f127e7cc4..08c06ce50 100644
--- a/lib/emscripten/src/unistd.rs
+++ b/lib/emscripten/src/unistd.rs
@@ -1,6 +1,6 @@
 use wasmer_runtime_core::vm::Ctx;
 
-pub fn confstr(_ctx: &mut Ctx, _name: i32, _bufPointer: i32, _len: i32) -> i32 {
-    debug!("unistd::confstr({}, {}, {})", _name, _bufPointer, _len);
+pub fn confstr(_ctx: &mut Ctx, _name: i32, _buf_pointer: i32, _len: i32) -> i32 {
+    debug!("unistd::confstr({}, {}, {})", _name, _buf_pointer, _len);
     0
 }