diff --git a/package.xml b/package.xml
index 45980082f9..5b5cbab2b3 100644
--- a/package.xml
+++ b/package.xml
@@ -63,6 +63,7 @@ http://pear.php.net/dtd/package-2.0.xsd">
   - Fixed bug #1451 : Sniff exclusions/restrictions dont work with custom sniffs unless they use the PHP_CodeSniffer NS
   - Fixed bug #1454 : Squiz.WhiteSpace.OperatorSpacing is not checking spacing on either side of a short ternary operator
     -- Thanks to Mponos George for the patch
+  - Fixed bug #1495 : Setting an invalid installed path breaks all commands
   - Fixed bug #1496 : Squiz.Strings.DoubleQuoteUsage not unescaping dollar sign when fixing
     -- Thanks to Michał Bundyra for the patch
  </notes>
diff --git a/src/Util/Standards.php b/src/Util/Standards.php
index e62fd1c2fd..7dc18ae10c 100644
--- a/src/Util/Standards.php
+++ b/src/Util/Standards.php
@@ -175,6 +175,11 @@ public static function getInstalledStandards(
                 continue;
             }
 
+            if (is_dir($standardsDir) === false) {
+                // Doesn't exist.
+                continue;
+            }
+
             $di = new \DirectoryIterator($standardsDir);
             foreach ($di as $file) {
                 if ($file->isDir() === true && $file->isDot() === false) {