diff --git a/src/libcharon/encoding/payloads/ike_header.c b/src/libcharon/encoding/payloads/ike_header.c
index e5831f431..9c1bbbedb 100644
--- a/src/libcharon/encoding/payloads/ike_header.c
+++ b/src/libcharon/encoding/payloads/ike_header.c
@@ -251,12 +251,24 @@ METHOD(ike_header_t, get_maj_version, u_int8_t,
 	return this->maj_version;
 }
 
+METHOD(ike_header_t, set_maj_version, void,
+	private_ike_header_t *this, u_int8_t major)
+{
+	this->maj_version = major;
+}
+
 METHOD(ike_header_t, get_min_version, u_int8_t,
 	private_ike_header_t *this)
 {
 	return this->min_version;
 }
 
+METHOD(ike_header_t, set_min_version, void,
+	private_ike_header_t *this, u_int8_t minor)
+{
+	this->min_version = minor;
+}
+
 METHOD(ike_header_t, get_response_flag, bool,
 	private_ike_header_t *this)
 {
@@ -340,7 +352,9 @@ ike_header_t *ike_header_create()
 			.get_responder_spi = _get_responder_spi,
 			.set_responder_spi = _set_responder_spi,
 			.get_maj_version = _get_maj_version,
+			.set_maj_version = _set_maj_version,
 			.get_min_version = _get_min_version,
+			.set_min_version = _set_min_version,
 			.get_response_flag = _get_response_flag,
 			.set_response_flag = _set_response_flag,
 			.get_version_flag = _get_version_flag,
diff --git a/src/libcharon/encoding/payloads/ike_header.h b/src/libcharon/encoding/payloads/ike_header.h
index e63e8bf06..7bb33a586 100644
--- a/src/libcharon/encoding/payloads/ike_header.h
+++ b/src/libcharon/encoding/payloads/ike_header.h
@@ -142,6 +142,13 @@ struct ike_header_t {
 	 */
 	u_int8_t (*get_maj_version) (ike_header_t *this);
 
+	/**
+	 * Set the major version.
+	 *
+	 * @param major			major version
+	 */
+	void (*set_maj_version) (ike_header_t *this, u_int8_t major);
+
 	/**
 	 * Get the minor version.
 	 *
@@ -149,6 +156,13 @@ struct ike_header_t {
 	 */
 	u_int8_t (*get_min_version) (ike_header_t *this);
 
+	/**
+	 * Set the minor version.
+	 *
+	 * @param minor			minor version
+	 */
+	void (*set_min_version) (ike_header_t *this, u_int8_t minor);
+
 	/**
 	 * Get the response flag.
 	 *