diff --git a/src/com/annimon/ownlang/lib/modules/functions/std_sync.java b/src/com/annimon/ownlang/lib/modules/functions/std_sync.java
new file mode 100644
index 0000000..0dd01c8
--- /dev/null
+++ b/src/com/annimon/ownlang/lib/modules/functions/std_sync.java
@@ -0,0 +1,36 @@
+package com.annimon.ownlang.lib.modules.functions;
+
+import com.annimon.ownlang.exceptions.TypeException;
+import com.annimon.ownlang.lib.*;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+
+public final class std_sync implements Function {
+
+    @Override
+    public Value execute(Value... args) {
+        Arguments.check(1, args.length);
+        if (args[0].type() != Types.FUNCTION) {
+            throw new TypeException(args[0].toString() + " is not a function");
+        }
+
+        final BlockingQueue<Value> queue = new LinkedBlockingQueue<>(2);
+        final Function synchronizer = (sArgs) -> {
+            try {
+                queue.put(sArgs[0]);
+            } catch (InterruptedException ex) {
+                Thread.currentThread().interrupt();
+            }
+            return NumberValue.ZERO;
+        };
+        final Function callback = ((FunctionValue) args[0]).getValue();
+        callback.execute(new FunctionValue(synchronizer));
+
+        try {
+            return queue.take();
+        } catch (InterruptedException ex) {
+            throw new RuntimeException(ex);
+        }
+    }
+    
+}
\ No newline at end of file
diff --git a/src/com/annimon/ownlang/lib/modules/std.java b/src/com/annimon/ownlang/lib/modules/std.java
index d304764..1b9e4aa 100644
--- a/src/com/annimon/ownlang/lib/modules/std.java
+++ b/src/com/annimon/ownlang/lib/modules/std.java
@@ -18,6 +18,7 @@ public final class std implements Module {
         Functions.set("time", new std_time());
         Functions.set("sleep", new std_sleep());
         Functions.set("thread", new std_thread());
+        Functions.set("sync", new std_sync());
         
         // String
         Functions.set("sprintf", new std_sprintf());