diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index a48bc1e904..509d6b01ee 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -1294,11 +1294,11 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
     switch (val) {
     case MIGRATION_PARAMETER_COMPRESS_LEVEL:
         p->has_compress_level = true;
-        visit_type_int(v, param, &p->compress_level, &err);
+        visit_type_uint8(v, param, &p->compress_level, &err);
         break;
     case MIGRATION_PARAMETER_COMPRESS_THREADS:
         p->has_compress_threads = true;
-        visit_type_int(v, param, &p->compress_threads, &err);
+        visit_type_uint8(v, param, &p->compress_threads, &err);
         break;
     case MIGRATION_PARAMETER_COMPRESS_WAIT_THREAD:
         p->has_compress_wait_thread = true;
@@ -1306,19 +1306,19 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
         break;
     case MIGRATION_PARAMETER_DECOMPRESS_THREADS:
         p->has_decompress_threads = true;
-        visit_type_int(v, param, &p->decompress_threads, &err);
+        visit_type_uint8(v, param, &p->decompress_threads, &err);
         break;
     case MIGRATION_PARAMETER_THROTTLE_TRIGGER_THRESHOLD:
         p->has_throttle_trigger_threshold = true;
-        visit_type_int(v, param, &p->throttle_trigger_threshold, &err);
+        visit_type_uint8(v, param, &p->throttle_trigger_threshold, &err);
         break;
     case MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL:
         p->has_cpu_throttle_initial = true;
-        visit_type_int(v, param, &p->cpu_throttle_initial, &err);
+        visit_type_uint8(v, param, &p->cpu_throttle_initial, &err);
         break;
     case MIGRATION_PARAMETER_CPU_THROTTLE_INCREMENT:
         p->has_cpu_throttle_increment = true;
-        visit_type_int(v, param, &p->cpu_throttle_increment, &err);
+        visit_type_uint8(v, param, &p->cpu_throttle_increment, &err);
         break;
     case MIGRATION_PARAMETER_CPU_THROTTLE_TAILSLOW:
         p->has_cpu_throttle_tailslow = true;
@@ -1326,7 +1326,7 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
         break;
     case MIGRATION_PARAMETER_MAX_CPU_THROTTLE:
         p->has_max_cpu_throttle = true;
-        visit_type_int(v, param, &p->max_cpu_throttle, &err);
+        visit_type_uint8(v, param, &p->max_cpu_throttle, &err);
         break;
     case MIGRATION_PARAMETER_TLS_CREDS:
         p->has_tls_creds = true;
@@ -1362,11 +1362,11 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
         break;
     case MIGRATION_PARAMETER_DOWNTIME_LIMIT:
         p->has_downtime_limit = true;
-        visit_type_int(v, param, &p->downtime_limit, &err);
+        visit_type_size(v, param, &p->downtime_limit, &err);
         break;
     case MIGRATION_PARAMETER_X_CHECKPOINT_DELAY:
         p->has_x_checkpoint_delay = true;
-        visit_type_int(v, param, &p->x_checkpoint_delay, &err);
+        visit_type_uint32(v, param, &p->x_checkpoint_delay, &err);
         break;
     case MIGRATION_PARAMETER_BLOCK_INCREMENTAL:
         p->has_block_incremental = true;
@@ -1374,7 +1374,7 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
         break;
     case MIGRATION_PARAMETER_MULTIFD_CHANNELS:
         p->has_multifd_channels = true;
-        visit_type_int(v, param, &p->multifd_channels, &err);
+        visit_type_uint8(v, param, &p->multifd_channels, &err);
         break;
     case MIGRATION_PARAMETER_MULTIFD_COMPRESSION:
         p->has_multifd_compression = true;
@@ -1383,11 +1383,11 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
         break;
     case MIGRATION_PARAMETER_MULTIFD_ZLIB_LEVEL:
         p->has_multifd_zlib_level = true;
-        visit_type_int(v, param, &p->multifd_zlib_level, &err);
+        visit_type_uint8(v, param, &p->multifd_zlib_level, &err);
         break;
     case MIGRATION_PARAMETER_MULTIFD_ZSTD_LEVEL:
         p->has_multifd_zstd_level = true;
-        visit_type_int(v, param, &p->multifd_zstd_level, &err);
+        visit_type_uint8(v, param, &p->multifd_zstd_level, &err);
         break;
     case MIGRATION_PARAMETER_XBZRLE_CACHE_SIZE:
         p->has_xbzrle_cache_size = true;
diff --git a/qapi/migration.json b/qapi/migration.json
index 6c12b368aa..37026643ab 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -890,28 +890,28 @@
             '*announce-max': 'size',
             '*announce-rounds': 'size',
             '*announce-step': 'size',
-            '*compress-level': 'int',
-            '*compress-threads': 'int',
+            '*compress-level': 'uint8',
+            '*compress-threads': 'uint8',
             '*compress-wait-thread': 'bool',
-            '*decompress-threads': 'int',
-            '*throttle-trigger-threshold': 'int',
-            '*cpu-throttle-initial': 'int',
-            '*cpu-throttle-increment': 'int',
+            '*decompress-threads': 'uint8',
+            '*throttle-trigger-threshold': 'uint8',
+            '*cpu-throttle-initial': 'uint8',
+            '*cpu-throttle-increment': 'uint8',
             '*cpu-throttle-tailslow': 'bool',
             '*tls-creds': 'StrOrNull',
             '*tls-hostname': 'StrOrNull',
             '*tls-authz': 'StrOrNull',
-            '*max-bandwidth': 'int',
-            '*downtime-limit': 'int',
-            '*x-checkpoint-delay': 'int',
+            '*max-bandwidth': 'size',
+            '*downtime-limit': 'uint64',
+            '*x-checkpoint-delay': 'uint32',
             '*block-incremental': 'bool',
-            '*multifd-channels': 'int',
+            '*multifd-channels': 'uint8',
             '*xbzrle-cache-size': 'size',
             '*max-postcopy-bandwidth': 'size',
-            '*max-cpu-throttle': 'int',
+            '*max-cpu-throttle': 'uint8',
             '*multifd-compression': 'MultiFDCompression',
-            '*multifd-zlib-level': 'int',
-            '*multifd-zstd-level': 'int',
+            '*multifd-zlib-level': 'uint8',
+            '*multifd-zstd-level': 'uint8',
             '*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ] } }
 
 ##
@@ -1098,7 +1098,7 @@
             '*max-bandwidth': 'size',
             '*downtime-limit': 'uint64',
             '*x-checkpoint-delay': 'uint32',
-            '*block-incremental': 'bool' ,
+            '*block-incremental': 'bool',
             '*multifd-channels': 'uint8',
             '*xbzrle-cache-size': 'size',
             '*max-postcopy-bandwidth': 'size',