diff --git a/iommu_ref_model/libiommu/src/iommu_msi_trans.c b/iommu_ref_model/libiommu/src/iommu_msi_trans.c
index 85e4e3a7..ec930fb9 100644
--- a/iommu_ref_model/libiommu/src/iommu_msi_trans.c
+++ b/iommu_ref_model/libiommu/src/iommu_msi_trans.c
@@ -109,7 +109,7 @@ msi_address_translation(
     //       set within msipte, stop and report "MSI PTE misconfigured" (cause = 263).
     //    b. Compute the translated address as `msipte.PPN << 12 | A[11:0]`.
     if ( msipte.M == 3 ) {
-        if ( msipte.translate_rw.reserved != 0 ) {
+        if ( msipte.translate_rw.reserved != 0 || msipte.translate_rw.reserved0 != 0 ) {
             *cause = 263;
             return 1;
         }
@@ -136,7 +136,7 @@ msi_address_translation(
     }
 
     //    b. If any bits or encoding that are reserved for future standard use are
-    //       set within `msipte`, stop and report "MSI PTE misconfigured" (cause = 262).
+    //       set within `msipte`, stop and report "MSI PTE misconfigured" (cause = 263).
     if ( msipte.mrif.reserved1 != 0 || msipte.mrif.reserved2 != 0 ||
          msipte.mrif.reserved3 != 0 || msipte.mrif.reserved4 != 0 ) {
         *cause = 263;
diff --git a/iommu_ref_model/test/test_app.c b/iommu_ref_model/test/test_app.c
index 9a3b6170..ffd706d6 100644
--- a/iommu_ref_model/test/test_app.c
+++ b/iommu_ref_model/test/test_app.c
@@ -3244,8 +3244,54 @@ main(void) {
              0, 0, 0, ADDR_TYPE_UNTRANSLATED, gpa, 4, WRITE, &req, &rsp);
     fail_if( ( check_rsp_and_faults(&req, &rsp, UNSUPPORTED_REQUEST, 263, 0) < 0 ) );
 
+    msipte.C = 0;
+    msipte.M = 0x3;
+    msipte.translate_rw.reserved = 0x1;
+    msipte.translate_rw.reserved0 = 0x0;
+    write_memory((char *)&msipte, ((DC.msiptp.PPN * PAGESIZE) + 3 * 16), 16);
+    send_translation_request(0x042874, 0, 0x0000, 0,
+             0, 0, 0, ADDR_TYPE_UNTRANSLATED, gpa, 4, WRITE, &req, &rsp);
+    fail_if( ( check_rsp_and_faults(&req, &rsp, UNSUPPORTED_REQUEST, 263, 0) < 0) );
+    msipte.translate_rw.reserved = 0x0;
+    msipte.translate_rw.reserved = 0x4;
+    write_memory((char *)&msipte, ((DC.msiptp.PPN * PAGESIZE) + 3 * 16), 16);
+    send_translation_request(0x042874, 0, 0x0000, 0,
+             0, 0, 0, ADDR_TYPE_UNTRANSLATED, gpa, 4, WRITE, &req, &rsp);
+    fail_if( ( check_rsp_and_faults(&req, &rsp, UNSUPPORTED_REQUEST, 263, 0) < 0) );
+
+    msipte.C = 0;
+    msipte.M = 0x3;
+    msipte.translate_rw.reserved = 0x0;
+    msipte.translate_rw.reserved0 = 0x1;
+    write_memory((char *)&msipte, ((DC.msiptp.PPN * PAGESIZE) + 3 * 16), 16);
+    send_translation_request(0x042874, 0, 0x0000, 0,
+             0, 0, 0, ADDR_TYPE_UNTRANSLATED, gpa, 4, WRITE, &req, &rsp);
+    fail_if( ( check_rsp_and_faults(&req, &rsp, UNSUPPORTED_REQUEST, 263, 0) < 0) );
+    msipte.translate_rw.reserved = 0x0;
+    msipte.translate_rw.reserved = 0x4;
+    write_memory((char *)&msipte, ((DC.msiptp.PPN * PAGESIZE) + 3 * 16), 16);
+    send_translation_request(0x042874, 0, 0x0000, 0,
+             0, 0, 0, ADDR_TYPE_UNTRANSLATED, gpa, 4, WRITE, &req, &rsp);
+    fail_if( ( check_rsp_and_faults(&req, &rsp, UNSUPPORTED_REQUEST, 263, 0) < 0) );
+
+    msipte.C = 0;
+    msipte.M = 0x3;
+    msipte.translate_rw.reserved = 0x1;
+    msipte.translate_rw.reserved0 = 0x1;
+    write_memory((char *)&msipte, ((DC.msiptp.PPN * PAGESIZE) + 3 * 16), 16);
+    send_translation_request(0x042874, 0, 0x0000, 0,
+             0, 0, 0, ADDR_TYPE_UNTRANSLATED, gpa, 4, WRITE, &req, &rsp);
+    fail_if( ( check_rsp_and_faults(&req, &rsp, UNSUPPORTED_REQUEST, 263, 0) < 0) );
+    msipte.translate_rw.reserved = 0x0;
+    msipte.translate_rw.reserved = 0x4;
+    write_memory((char *)&msipte, ((DC.msiptp.PPN * PAGESIZE) + 3 * 16), 16);
+    send_translation_request(0x042874, 0, 0x0000, 0,
+             0, 0, 0, ADDR_TYPE_UNTRANSLATED, gpa, 4, WRITE, &req, &rsp);
+    fail_if( ( check_rsp_and_faults(&req, &rsp, UNSUPPORTED_REQUEST, 263, 0) < 0) );
+
     // Write through PTE
     msipte.translate_rw.reserved = 0x0;
+    msipte.translate_rw.reserved0 = 0x0;
     msipte.translate_rw.M = 0x3;
     msipte.translate_rw.PPN = 0xdeadbeef;
     write_memory((char *)&msipte, ((DC.msiptp.PPN * PAGESIZE) + 3 * 16), 16);