diff --git a/core/src/main/java/org/keycloak/representations/adapters/config/PolicyEnforcerConfig.java b/core/src/main/java/org/keycloak/representations/adapters/config/PolicyEnforcerConfig.java
index 073a47d435..8fae65ba4e 100644
--- a/core/src/main/java/org/keycloak/representations/adapters/config/PolicyEnforcerConfig.java
+++ b/core/src/main/java/org/keycloak/representations/adapters/config/PolicyEnforcerConfig.java
@@ -329,6 +329,7 @@ public class PolicyEnforcerConfig {
 
         @JsonProperty("max-entries")
         int maxEntries = 1000;
+        @JsonProperty("lifespan")
         long lifespan = 30000;
 
         public int getMaxEntries() {