diff --git a/distribution/api-docs-dist/pom.xml b/distribution/api-docs-dist/pom.xml
index 2772f40285..81e45ca7ba 100755
--- a/distribution/api-docs-dist/pom.xml
+++ b/distribution/api-docs-dist/pom.xml
@@ -31,6 +31,7 @@
 
     <properties>
         <javadoc.branding>Keycloak ${project.version}</javadoc.branding>
+        <maven.compiler.release>11</maven.compiler.release>
     </properties>
 
     <dependencies>
diff --git a/federation/sssd/src/main/java/org/jvnet/libpam/PAM.java b/federation/sssd/src/main/java/org/jvnet/libpam/PAM.java
index 190e7b5413..9dbbb9ad2d 100644
--- a/federation/sssd/src/main/java/org/jvnet/libpam/PAM.java
+++ b/federation/sssd/src/main/java/org/jvnet/libpam/PAM.java
@@ -78,7 +78,7 @@ public class PAM {
      */
     public PAM(String serviceName) throws PAMException {
         pam_conv conv = new pam_conv(new PamCallback() {
-            public int callback(int num_msg, Pointer msg, Pointer resp, Pointer _) {
+            public int callback(int num_msg, Pointer msg, Pointer resp, Pointer _ptr) {
                 LOGGER.debug("pam_conv num_msg=" + num_msg);
                 if (factors == null)
                     return PAM_CONV_ERR;
diff --git a/federation/sssd/src/main/java/org/jvnet/libpam/impl/PAMLibrary.java b/federation/sssd/src/main/java/org/jvnet/libpam/impl/PAMLibrary.java
index a34ec3184a..f2a16114c0 100644
--- a/federation/sssd/src/main/java/org/jvnet/libpam/impl/PAMLibrary.java
+++ b/federation/sssd/src/main/java/org/jvnet/libpam/impl/PAMLibrary.java
@@ -116,18 +116,18 @@ public interface PAMLibrary extends Library {
              * resp and its member string both needs to be allocated by malloc,
              * to be freed by the caller.
              */
-            int callback(int num_msg, Pointer msg, Pointer resp, Pointer _);
+            int callback(int num_msg, Pointer msg, Pointer resp, Pointer _ptr);
         }
 
         public PamCallback conv;
-        public Pointer _;
+        public Pointer _ptr;
 
         public pam_conv(PamCallback conv) {
             this.conv = conv;
         }
 
         protected List getFieldOrder() {
-            return Arrays.asList("conv", "_");
+            return Arrays.asList("conv", "_ptr");
         }
     }