diff --git a/saml-core-api/src/main/java/org/keycloak/dom/saml/v1/assertion/SAML11EvidenceType.java b/saml-core-api/src/main/java/org/keycloak/dom/saml/v1/assertion/SAML11EvidenceType.java
index 7a32a8e432..5119bd6854 100755
--- a/saml-core-api/src/main/java/org/keycloak/dom/saml/v1/assertion/SAML11EvidenceType.java
+++ b/saml-core-api/src/main/java/org/keycloak/dom/saml/v1/assertion/SAML11EvidenceType.java
@@ -59,7 +59,7 @@ public class SAML11EvidenceType {
     }
 
     public boolean remove(SAML11AssertionType assertion) {
-        return this.assertions.remove(assertionIDReference);
+        return this.assertions.remove(assertion);
     }
 
     public List<SAML11AssertionType> getAssertions() {