diff --git a/kiri-engine/FileListen/FileChangeCustomProcess.php b/kiri-engine/FileListen/FileChangeCustomProcess.php
index 3c4ffba1..93489c77 100644
--- a/kiri-engine/FileListen/FileChangeCustomProcess.php
+++ b/kiri-engine/FileListen/FileChangeCustomProcess.php
@@ -117,7 +117,9 @@ class FileChangeCustomProcess extends Command
 		foreach ($this->pipes as $pipe) {
 			fclose($pipe);
 		}
-		proc_close($this->source);
+		if (is_resource($this->source)) {
+			proc_close($this->source);
+		}
 	}
 
 }