diff --git a/lib/SAML2/HTTPArtifact.php b/lib/SAML2/HTTPArtifact.php
index d57274212137b3fbdeadef73990078c095221422..2294c959b59b587a60e3976cdf5eb3788963e5b0 100644
--- a/lib/SAML2/HTTPArtifact.php
+++ b/lib/SAML2/HTTPArtifact.php
@@ -73,7 +73,7 @@ class SAML2_HTTPArtifact extends SAML2_Binding {
 			$sourceId = bin2hex(substr($artifact,4,20));
 
 		}else{
-			throw new Execption('Missing SAMLArt parameter.');
+			throw new Exception('Missing SAMLArt parameter.');
 		}
 
 		$metadataHandler = SimpleSAML_Metadata_MetaDataStorageHandler::getMetadataHandler();