diff --git a/lib/src/asn1/liblte_s1ap.cc b/lib/src/asn1/liblte_s1ap.cc
index 68481438a..056d27f2a 100644
--- a/lib/src/asn1/liblte_s1ap.cc
+++ b/lib/src/asn1/liblte_s1ap.cc
@@ -14469,7 +14469,7 @@ LIBLTE_ERROR_ENUM liblte_s1ap_pack_servedgummeis(
     }
     // Length
     liblte_value_2_bits(ie->len-1, ptr, 3);
-    liblte_align_up_zero(ptr, 8);
+    // liblte_align_up_zero(ptr, 8);
     uint32_t i;
     for(i=0;i<ie->len;i++) {
       if(liblte_s1ap_pack_servedgummeisitem(&ie->buffer[i], ptr) != LIBLTE_SUCCESS) {
@@ -14492,7 +14492,7 @@ LIBLTE_ERROR_ENUM liblte_s1ap_unpack_servedgummeis(
   {
     // Length
     ie->len = liblte_bits_2_value(ptr, 3) + 1;
-    liblte_align_up(ptr, 8);
+    // liblte_align_up(ptr, 8);
     if(ie->len > 32) {
       liblte_log_print("ServedGUMMEIs unpack error - max supported dynamic sequence length = 32, ie->len = %d\n", ie->len);
       return LIBLTE_ERROR_DECODE_FAIL;
diff --git a/lib/test/asn1/CMakeLists.txt b/lib/test/asn1/CMakeLists.txt
index fc1e6b325..885329bd4 100644
--- a/lib/test/asn1/CMakeLists.txt
+++ b/lib/test/asn1/CMakeLists.txt
@@ -18,6 +18,10 @@
 # and at http://www.gnu.org/licenses/.
 #
 
+add_executable(s1ap_test s1ap_test.cc)
+target_link_libraries(s1ap_test srslte_common srslte_asn1)
+add_test(s1ap_test s1ap_test)
+
 add_executable(srslte_asn1_rrc_mcch_test srslte_asn1_rrc_mcch_test.cc)
 target_link_libraries(srslte_asn1_rrc_mcch_test rrc_asn1 srslte_common)
 add_test(srslte_asn1_rrc_mcch_test srslte_asn1_rrc_mcch_test)
diff --git a/lib/test/asn1/s1ap_test.cc b/lib/test/asn1/s1ap_test.cc
new file mode 100644
index 000000000..9cf92605f
--- /dev/null
+++ b/lib/test/asn1/s1ap_test.cc
@@ -0,0 +1,58 @@
+/**
+ *
+ * \section COPYRIGHT
+ *
+ * Copyright 2013-2019 Software Radio Systems Limited
+ *
+ * \section LICENSE
+ *
+ * This file is part of the srsLTE library.
+ *
+ * srsUE is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * srsUE is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
+ *
+ */
+
+#include "srslte/asn1/liblte_s1ap.h"
+#include "srslte/common/log_filter.h"
+#include <assert.h>
+#include <string.h>
+
+void unpack_test_served_gummeis_with_multiple_plmns() {
+  srslte::log_filter log1("Log");
+  log1.set_level(srslte::LOG_LEVEL_DEBUG);
+  log1.set_hex_limit(1024);
+  LIBLTE_S1AP_S1AP_PDU_STRUCT compare_pdu;
+  LIBLTE_S1AP_S1AP_PDU_STRUCT output_pdu;
+  LIBLTE_BYTE_MSG_STRUCT input_pdu;
+
+  uint8_t pdu[] = {0x20, 0x11, 0x00, 0x26, 0x00, 0x00, 0x02, 0x00, 0x69,
+                   0x00, 0x1a, 0x01, 0x40, 0x00, 0xf1, 0x10, 0x00, 0xf1,
+                   0x10, 0x00, 0xf1, 0x10, 0x00, 0xf1, 0x10, 0x00, 0xf1,
+                   0x10, 0x00, 0xf1, 0x10, 0x00, 0x00, 0x88, 0x88, 0x00,
+                   0x7b, 0x00, 0x57, 0x40, 0x01, 0xff};
+
+  input_pdu.N_bytes = sizeof(pdu);
+
+  memcpy(&input_pdu.msg, pdu, sizeof(pdu));
+
+  log1.debug_hex(input_pdu.msg, input_pdu.N_bytes, "Input message len = %d",
+                 input_pdu.N_bytes);
+  assert(liblte_s1ap_unpack_s1ap_pdu((LIBLTE_BYTE_MSG_STRUCT *)&input_pdu,
+                                     &output_pdu) == LIBLTE_SUCCESS);
+}
+
+int main(int argc, char **argv) {
+  unpack_test_served_gummeis_with_multiple_plmns();
+}