diff --git a/lib/emscripten/src/syscalls/unix/mod.rs b/lib/emscripten/src/syscalls/unix/mod.rs
index 92aecfbae..f23133b1b 100644
--- a/lib/emscripten/src/syscalls/unix/mod.rs
+++ b/lib/emscripten/src/syscalls/unix/mod.rs
@@ -14,7 +14,7 @@ pub use vfs::*;
 
 /// NOTE: TODO: These syscalls only support wasm_32 for now because they assume offsets are u32
 /// Syscall list: https://www.cs.utexas.edu/~bismith/test/syscalls/syscalls32.html
-use libc::{c_int, dup2, fcntl, pid_t, rusage, setpgid, uname, utsname, EINVAL, F_GETFD, F_SETFD};
+use libc::{c_int, pid_t, rusage, setpgid, uname, utsname};
 use wasmer_runtime_core::vm::Ctx;
 
 // Linking to functions that are not provided by rust libc
@@ -103,37 +103,3 @@ pub fn ___syscall212(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
 
     unsafe { libc::chown(pathname_addr, owner, group) }
 }
-
-/// dup3
-pub fn ___syscall330(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> pid_t {
-    // Implementation based on description at https://linux.die.net/man/2/dup3
-    debug!("emscripten::___syscall330 (dup3)");
-    let oldfd: c_int = varargs.get(ctx);
-    let newfd: c_int = varargs.get(ctx);
-    let flags: c_int = varargs.get(ctx);
-
-    if oldfd == newfd {
-        return EINVAL;
-    }
-
-    let res = unsafe { dup2(oldfd, newfd) };
-
-    // Set flags on newfd (https://www.gnu.org/software/libc/manual/html_node/Descriptor-Flags.html)
-    let mut old_flags = unsafe { fcntl(newfd, F_GETFD, 0) };
-
-    if old_flags > 0 {
-        old_flags |= flags;
-    } else if old_flags == 0 {
-        old_flags &= !flags;
-    }
-
-    unsafe {
-        fcntl(newfd, F_SETFD, old_flags);
-    }
-
-    debug!(
-        "=> oldfd: {}, newfd: {}, flags: {} = pid: {}",
-        oldfd, newfd, flags, res
-    );
-    res
-}
diff --git a/lib/emscripten/src/syscalls/unix/vfs.rs b/lib/emscripten/src/syscalls/unix/vfs.rs
index 39f8ad025..3585885ce 100644
--- a/lib/emscripten/src/syscalls/unix/vfs.rs
+++ b/lib/emscripten/src/syscalls/unix/vfs.rs
@@ -114,7 +114,7 @@ pub fn ___syscall15(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
     0
 }
 
-// mkdir
+/// mkdir
 pub fn ___syscall39(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
     debug!("emscripten::___syscall39 (mkdir vfs) {}", _which);
     let pathname: u32 = varargs.get(ctx);
@@ -132,7 +132,6 @@ pub fn ___syscall39(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int
     } else {
         -1
     };
-    //    debug!("mkdir returns {}", ret);
     ret
 }