diff --git a/appinfo/install.php b/appinfo/install.php
deleted file mode 100644
index 489671b..0000000
--- a/appinfo/install.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-//make staticperl executable for people without perl.
-$perl_bin = __DIR__ . '/../bin/staticperl';
-if (file_exists($perl_bin) && is_writable($perl_bin)) {
-	chmod($perl_bin, 0744);
-}
\ No newline at end of file
diff --git a/lib/RawPreview.php b/lib/RawPreview.php
index 98e476f..bbe8cbb 100644
--- a/lib/RawPreview.php
+++ b/lib/RawPreview.php
@@ -15,6 +15,9 @@ public function __construct() {
         //fallback to static vendored perl
         if (empty($perl_bin) && substr(php_uname("m"), 0, 3) === 'x86') {
             $perl_bin = realpath(__DIR__ . '/../bin/staticperl');
+            if (!is_executable($perl_bin) && is_writable($perl_bin)) {
+                chmod($perl_bin, 0744);
+            }
         }
 
         $this->converter = $perl_bin . ' ' . realpath(__DIR__ . '/../vendor/jmoati/exiftool-bin/exiftool');