diff --git a/src/StreamSelectLoop.php b/src/StreamSelectLoop.php
index 7d455048..395f7f8b 100644
--- a/src/StreamSelectLoop.php
+++ b/src/StreamSelectLoop.php
@@ -218,7 +218,12 @@ private function waitForStreamActivity($timeout)
         $read  = $this->readStreams;
         $write = $this->writeStreams;
 
-        $this->streamSelect($read, $write, $timeout);
+        $available = $this->streamSelect($read, $write, $timeout);
+        if (false === $available) {
+            // if a system call has been interrupted,
+            // we cannot rely on it's outcome
+            return;
+        }
 
         foreach ($read as $stream) {
             $key = (int) $stream;