diff --git a/classes/ezsolrdoc.php b/classes/ezsolrdoc.php
index 7f7fb5b1..79432913 100644
--- a/classes/ezsolrdoc.php
+++ b/classes/ezsolrdoc.php
@@ -118,7 +118,9 @@ function docToXML()
 
         if ($this->DocBoost !== null && is_numeric( $this->DocBoost ) )
         {
-            $this->DomRootElement->setAttribute( 'boost', $this->DocBoost );
+            // This will force the '.' as decimal separator and not depend on the locale
+            $docBoost = sprintf('%F',$this->DocBoost);
+            $this->DomRootElement->setAttribute( 'boost', $docBoost );
         }
 
         foreach ($this->Doc as $name => $field) {
@@ -155,4 +157,4 @@ function docToXML()
 }
 
 
-?>
\ No newline at end of file
+?>