diff --git a/modules/saml/lib/Auth/Source/SP.php b/modules/saml/lib/Auth/Source/SP.php
index 0340a1b4d042d1d9978548ace812968c7ea1f537..9a159796a9978ab1cd53199b23693b94bf439968 100644
--- a/modules/saml/lib/Auth/Source/SP.php
+++ b/modules/saml/lib/Auth/Source/SP.php
@@ -264,7 +264,7 @@ class SP extends \SimpleSAML\Auth\Source
         }
 
         // add signature options
-        if ($this->metadata->hasValue('WantAssertiosnsSigned')) {
+        if ($this->metadata->hasValue('WantAssertionsSigned')) {
             $metadata['saml20.sign.assertion'] = $this->metadata->getBoolean('WantAssertionsSigned');
         }
         if ($this->metadata->hasValue('redirect.sign')) {