diff --git a/phase4-profile-entsog/src/main/java/com/helger/phase4/profile/entsog/ENTSOGPMode.java b/phase4-profile-entsog/src/main/java/com/helger/phase4/profile/entsog/ENTSOGPMode.java
index 71c9c7f0e..29de1dd71 100644
--- a/phase4-profile-entsog/src/main/java/com/helger/phase4/profile/entsog/ENTSOGPMode.java
+++ b/phase4-profile-entsog/src/main/java/com/helger/phase4/profile/entsog/ENTSOGPMode.java
@@ -57,7 +57,12 @@
 public final class ENTSOGPMode
 {
   public static final String DEFAULT_AGREEMENT_ID = "urn:as4:agreement";
-  public static final String ENTSOG_PARTY_ID_TYPE = "http://www.entsog.eu/eic-codes/eic-party-codes-x";
+  /**
+   * The fixed value of the <code>type</code> attribute of <code>PartyId</code>, indicating that the
+   * value is an EIC code. Note the host name is "entsoe.eu" (ENTSO-E maintains the EIC scheme), not
+   * "entsog.eu". See the ENTSOG AS4 Usage Profile, section "Party Identification".
+   */
+  public static final String ENTSOG_PARTY_ID_TYPE = "http://www.entsoe.eu/eic-codes/eic-party-codes-x";
 
   private ENTSOGPMode ()
   {}
diff --git a/phase4-profile-entsog/src/test/java/com/helger/phase4/profile/entsog/ENTSOGPModeTest.java b/phase4-profile-entsog/src/test/java/com/helger/phase4/profile/entsog/ENTSOGPModeTest.java
index 25b82f3e7..9ed98063b 100644
--- a/phase4-profile-entsog/src/test/java/com/helger/phase4/profile/entsog/ENTSOGPModeTest.java
+++ b/phase4-profile-entsog/src/test/java/com/helger/phase4/profile/entsog/ENTSOGPModeTest.java
@@ -19,6 +19,7 @@
  */
 package com.helger.phase4.profile.entsog;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 
 import org.junit.ClassRule;
@@ -47,5 +48,10 @@ public void testENTSOGPMode ()
                                                         IPModeIDProvider.DEFAULT_DYNAMIC,
                                                         false);
     assertNotNull (aPMode);
+
+    // ENTSOG AS4 Usage Profile: "The type attribute on the PartyId element MUST be present and
+    // set to the fixed value http://www.entsoe.eu/eic-codes/eic-party-codes-x"
+    assertEquals ("http://www.entsoe.eu/eic-codes/eic-party-codes-x", aPMode.getInitiator ().getIDType ());
+    assertEquals ("http://www.entsoe.eu/eic-codes/eic-party-codes-x", aPMode.getResponder ().getIDType ());
   }
 }