diff --git a/lib/mfrc522/source/loop.php b/lib/mfrc522/source/loop.php
index 52be934..1dc44b7 100755
--- a/lib/mfrc522/source/loop.php
+++ b/lib/mfrc522/source/loop.php
@@ -294,15 +294,15 @@
 		/* (1) Check file */
 		$gstate = $f_gstate->current();
 
-		if( $f_gstate === false )
+		if( !$gstate )
 			return 127;
 
-		/* (2) Remove surrounding spaces */
-		$f_gstate = preg_replace('@^\s+@', '', $f_gstate);
-		$f_gstate = preg_replace('@\s+$@', '', $f_gstate);
+		/* (3) Remove surrounding spaces */
+		$gstate = preg_replace('@^\s+@', '', $gstate);
+		$gstate = preg_replace('@\s+$@', '', $gstate);
 
-		/* (3) Manage error */
-		if( strlen($state) < 1 )
+		/* (4) Manage error */
+		if( strlen($gstate) < 1 )
 			return 127;
 	
 		return 0;