if (msr->fault_expected)
                __GUEST_ASSERT(vector == GP_VECTOR,
                               "Expected #GP on %sMSR(0x%x), got vector '0x%x'",
-                              msr->idx, msr->write ? "WR" : "RD", vector);
+                              msr->write ? "WR" : "RD", msr->idx, vector);
        else
                __GUEST_ASSERT(!vector,
                               "Expected success on %sMSR(0x%x), got vector '0x%x'",
-                              msr->idx, msr->write ? "WR" : "RD", vector);
+                              msr->write ? "WR" : "RD", msr->idx, vector);
 
        if (vector || is_write_only_msr(msr->idx))
                goto done;
        vector = __hyperv_hypercall(hcall->control, input, output, &res);
        if (hcall->ud_expected) {
                __GUEST_ASSERT(vector == UD_VECTOR,
-                              "Expected #UD for control '%u', got vector '0x%x'",
+                              "Expected #UD for control '%lu', got vector '0x%x'",
                               hcall->control, vector);
        } else {
                __GUEST_ASSERT(!vector,
-                              "Expected no exception for control '%u', got vector '0x%x'",
+                              "Expected no exception for control '%lu', got vector '0x%x'",
                               hcall->control, vector);
                GUEST_ASSERT_EQ(res, hcall->expect);
        }