diff --git a/src/Tools/String.php b/src/Tools/String.php
index 41fd465..678fd26 100644
--- a/src/Tools/String.php
+++ b/src/Tools/String.php
@@ -18,7 +18,7 @@ class Tools_String {
 	    			$res[] = static::strToArray(implode(',', $subarr[$in_subarr]));
     				$in_subarr--;
     			}
-    		} elseif ($tok{0} === '{') { // we're inside a new sub-array							   
+    		} elseif ($tok[0] === '{') { // we're inside a new sub-array							   
         			if ('}' !== substr($tok, -1, 1)) {
     				$in_subarr++;
     				// if sub-array has more than one element