diff --git a/Universal/Sniffs/WhiteSpace/DisallowInlineTabsSniff.php b/Universal/Sniffs/WhiteSpace/DisallowInlineTabsSniff.php
index 3499506..9589969 100644
--- a/Universal/Sniffs/WhiteSpace/DisallowInlineTabsSniff.php
+++ b/Universal/Sniffs/WhiteSpace/DisallowInlineTabsSniff.php
@@ -91,11 +91,11 @@ public function register()
     public function process(File $phpcsFile, $stackPtr)
     {
         if (isset($this->tabWidth) === false) {
-            $this->tabWidth = Helper::getTabWidth($phpcsFile);
+            $this->tabWidth = (int) Helper::getTabWidth($phpcsFile);
         }
 
         if (\defined('PHP_CODESNIFFER_IN_TESTS')) {
-            $this->tabWidth = Helper::getCommandLineData($phpcsFile, 'tabWidth');
+            $this->tabWidth = (int) Helper::getCommandLineData($phpcsFile, 'tabWidth');
         }
 
         $tokens = $phpcsFile->getTokens();