diff --git a/modules/saml/lib/Auth/Source/SP.php b/modules/saml/lib/Auth/Source/SP.php
index 4dd06c044dd70d429a350fce090ac9a29ae77e40..188ed29e26875ecb6b45033504347fbc08107a3e 100644
--- a/modules/saml/lib/Auth/Source/SP.php
+++ b/modules/saml/lib/Auth/Source/SP.php
@@ -265,7 +265,7 @@ 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')) {