diff --git a/src/CompositeStream.php b/src/CompositeStream.php
index 153f2a3..dde091d 100644
--- a/src/CompositeStream.php
+++ b/src/CompositeStream.php
@@ -16,7 +16,8 @@ public function __construct(ReadableStreamInterface $readable, WritableStreamInt
         $this->writable = $writable;
 
         if (!$readable->isReadable() || !$writable->isWritable()) {
-            return $this->close();
+            $this->close();
+            return;
         }
 
         Util::forwardEvents($this->readable, $this, array('data', 'end', 'error'));
diff --git a/src/DuplexResourceStream.php b/src/DuplexResourceStream.php
index 5f038c6..c8c1c50 100644
--- a/src/DuplexResourceStream.php
+++ b/src/DuplexResourceStream.php
@@ -49,7 +49,7 @@ public function __construct($stream, LoopInterface $loop, $readChunkSize = null,
 
         // this class relies on non-blocking I/O in order to not interrupt the event loop
         // e.g. pipes on Windows do not support this: https://bugs.php.net/bug.php?id=47918
-        if (\stream_set_blocking($stream, 0) !== true) {
+        if (\stream_set_blocking($stream, false) !== true) {
             throw new \RuntimeException('Unable to set stream resource to non-blocking mode');
         }
 
diff --git a/src/ReadableResourceStream.php b/src/ReadableResourceStream.php
index 461f6e4..9d9c006 100644
--- a/src/ReadableResourceStream.php
+++ b/src/ReadableResourceStream.php
@@ -52,7 +52,7 @@ public function __construct($stream, LoopInterface $loop, $readChunkSize = null)
 
         // this class relies on non-blocking I/O in order to not interrupt the event loop
         // e.g. pipes on Windows do not support this: https://bugs.php.net/bug.php?id=47918
-        if (\stream_set_blocking($stream, 0) !== true) {
+        if (\stream_set_blocking($stream, false) !== true) {
             throw new \RuntimeException('Unable to set stream resource to non-blocking mode');
         }
 
diff --git a/src/WritableResourceStream.php b/src/WritableResourceStream.php
index 57c09b2..ff726cc 100644
--- a/src/WritableResourceStream.php
+++ b/src/WritableResourceStream.php
@@ -9,7 +9,15 @@ final class WritableResourceStream extends EventEmitter implements WritableStrea
 {
     private $stream;
     private $loop;
+
+    /**
+     * @var int
+     */
     private $softLimit;
+
+    /**
+     * @var int
+     */
     private $writeChunkSize;
 
     private $listening = false;
@@ -31,7 +39,7 @@ public function __construct($stream, LoopInterface $loop, $writeBufferSoftLimit
 
         // this class relies on non-blocking I/O in order to not interrupt the event loop
         // e.g. pipes on Windows do not support this: https://bugs.php.net/bug.php?id=47918
-        if (\stream_set_blocking($stream, 0) !== true) {
+        if (\stream_set_blocking($stream, false) !== true) {
             throw new \RuntimeException('Unable to set stream resource to non-blocking mode');
         }