diff --git a/lib/Predis/Connection/StreamConnection.php b/lib/Predis/Connection/StreamConnection.php
index da4b5928..4f98e36b 100644
--- a/lib/Predis/Connection/StreamConnection.php
+++ b/lib/Predis/Connection/StreamConnection.php
@@ -255,7 +255,7 @@ class StreamConnection extends AbstractConnection
 
         $buffer = "*{$reqlen}\r\n\${$cmdlen}\r\n{$commandID}\r\n";
 
-        for ($i = 0; $i < $reqlen - 1; $i++) {
+        for ($i = 0, $reqlen--; $i < $reqlen; $i++) {
             $argument = $arguments[$i];
             $arglen = strlen($argument);
             $buffer .= "\${$arglen}\r\n{$argument}\r\n";
diff --git a/lib/Predis/Protocol/Text/RequestSerializer.php b/lib/Predis/Protocol/Text/RequestSerializer.php
index cc276178..5d429d18 100644
--- a/lib/Predis/Protocol/Text/RequestSerializer.php
+++ b/lib/Predis/Protocol/Text/RequestSerializer.php
@@ -35,7 +35,7 @@ class RequestSerializer implements RequestSerializerInterface
 
         $buffer = "*{$reqlen}\r\n\${$cmdlen}\r\n{$commandID}\r\n";
 
-        for ($i = 0; $i < $reqlen - 1; $i++) {
+        for ($i = 0, $reqlen--; $i < $reqlen; $i++) {
             $argument = $arguments[$i];
             $arglen = strlen($argument);
             $buffer .= "\${$arglen}\r\n{$argument}\r\n";