diff --git a/glsk/glsk-commons/src/main/java/com/powsybl/glsk/commons/CountryEICode.java b/glsk/glsk-commons/src/main/java/com/powsybl/glsk/commons/CountryEICode.java
index 08702de1..0954885e 100644
--- a/glsk/glsk-commons/src/main/java/com/powsybl/glsk/commons/CountryEICode.java
+++ b/glsk/glsk-commons/src/main/java/com/powsybl/glsk/commons/CountryEICode.java
@@ -72,6 +72,7 @@ public Country getCountry() {
             case "10YGR-HTSO-----Y", "10YCB-GREECE---2" -> Country.GR;
             case "10YIT-GRTN-----B", "10YCB-ITALY----1" -> Country.IT;
             case "10YDK-1--------W" -> Country.DK;
+            case "10Y1001C--00100H" -> Country.XK;
             default -> throw new IllegalArgumentException("Unknown CountryEICode: " + codeString + ".");
         };
     }
@@ -104,6 +105,7 @@ public String getCode() {
             case GR -> "10YGR-HTSO-----Y";
             case IT -> "10YIT-GRTN-----B";
             case DK -> "10YDK-1--------W";
+            case XK -> "10Y1001C--00100H";
             default -> throw new IllegalArgumentException("Unknown CountryEICode for Country " + country + ".");
         };
     }
diff --git a/glsk/glsk-commons/src/test/java/com/powsybl/glsk/commons/CountryEICodeTest.java b/glsk/glsk-commons/src/test/java/com/powsybl/glsk/commons/CountryEICodeTest.java
index 98d34c8b..9f05a128 100644
--- a/glsk/glsk-commons/src/test/java/com/powsybl/glsk/commons/CountryEICodeTest.java
+++ b/glsk/glsk-commons/src/test/java/com/powsybl/glsk/commons/CountryEICodeTest.java
@@ -52,6 +52,7 @@ void testEicCodeConvergence() {
         assertEquals(Country.IT, new CountryEICode("10YIT-GRTN-----B").getCountry());
         assertEquals(Country.IT, new CountryEICode("10YCB-ITALY----1").getCountry());
         assertEquals(Country.DK, new CountryEICode("10YDK-1--------W").getCountry());
+        assertEquals(Country.XK, new CountryEICode("10Y1001C--00100H").getCountry());
         IllegalArgumentException e = assertThrows(IllegalArgumentException.class, () -> new CountryEICode("invalid code"));
         assertEquals("Unknown CountryEICode: invalid code.", e.getMessage());
     }
@@ -84,6 +85,7 @@ void testEicCodeFromCountry() {
         assertEquals("10YGR-HTSO-----Y", new CountryEICode(Country.GR).getCode());
         assertEquals("10YIT-GRTN-----B", new CountryEICode(Country.IT).getCode());
         assertEquals("10YDK-1--------W", new CountryEICode(Country.DK).getCode());
+        assertEquals("10Y1001C--00100H", new CountryEICode(Country.XK).getCode());
         IllegalArgumentException e = assertThrows(IllegalArgumentException.class, () -> new CountryEICode(Country.BR));
         assertEquals("Unknown CountryEICode for Country BR.", e.getMessage());
     }