diff --git a/Net/IPv6.php b/Net/IPv6.php
index e485886..543be00 100644
--- a/Net/IPv6.php
+++ b/Net/IPv6.php
@@ -848,10 +848,10 @@ function SplitV64($ip, $uncompress = true)
                 return array("", $ip);
             }
 
-            $ip{$pos} = '_';
+            $ip[$pos] = '_';
             $ipPart   = explode('_', $ip);
             
-            if ($ip{$pos-1} === ":") {
+            if ($ip[$pos-1] === ":") {
                 $ipPart[0] .= ":";
             }