diff --git a/integration/servlet-adapter-spi/src/main/java/org/keycloak/adapters/servlet/FilterSessionStore.java b/integration/servlet-adapter-spi/src/main/java/org/keycloak/adapters/servlet/FilterSessionStore.java
index aad0ec5..641ca70 100755
--- a/integration/servlet-adapter-spi/src/main/java/org/keycloak/adapters/servlet/FilterSessionStore.java
+++ b/integration/servlet-adapter-spi/src/main/java/org/keycloak/adapters/servlet/FilterSessionStore.java
@@ -90,6 +90,9 @@ public class FilterSessionStore implements AdapterSessionStore {
MultivaluedHashMap<String, String> getParams() {
if (parameters != null) return parameters;
+
+ if (body == null) return new MultivaluedHashMap<String, String>();
+
String contentType = getContentType();
contentType = contentType.toLowerCase();
if (contentType.startsWith("application/x-www-form-urlencoded")) {
