diff --git a/libraries/libstratosphere/include/stratosphere/fs/fs_system_data.hpp b/libraries/libstratosphere/include/stratosphere/fs/fs_system_data.hpp
index e89ef8824..e95425e86 100644
--- a/libraries/libstratosphere/include/stratosphere/fs/fs_system_data.hpp
+++ b/libraries/libstratosphere/include/stratosphere/fs/fs_system_data.hpp
@@ -18,9 +18,9 @@
 
 namespace ams::fs {
 
-    Result QueryMountSystemDataCacheSize(size_t *out, ncm::DataId data_id);
+    Result QueryMountSystemDataCacheSize(size_t *out, ncm::SystemDataId data_id);
 
-    Result MountSystemData(const char *name, ncm::DataId data_id);
-    Result MountSystemData(const char *name, ncm::DataId data_id, void *cache_buffer, size_t cache_size);
+    Result MountSystemData(const char *name, ncm::SystemDataId data_id);
+    Result MountSystemData(const char *name, ncm::SystemDataId data_id, void *cache_buffer, size_t cache_size);
 
 }
diff --git a/libraries/libstratosphere/source/fs/fs_system_data.cpp b/libraries/libstratosphere/source/fs/fs_system_data.cpp
index 3231e330c..07d20140b 100644
--- a/libraries/libstratosphere/source/fs/fs_system_data.cpp
+++ b/libraries/libstratosphere/source/fs/fs_system_data.cpp
@@ -18,15 +18,15 @@
 
 namespace ams::fs {
 
-    Result QueryMountSystemDataCacheSize(size_t *out, ncm::DataId data_id) {
+    Result QueryMountSystemDataCacheSize(size_t *out, ncm::SystemDataId data_id) {
         return impl::QueryMountDataCacheSize(out, data_id, ncm::StorageId::BuiltInSystem);
     }
 
-    Result MountSystemData(const char *name, ncm::DataId data_id) {
+    Result MountSystemData(const char *name, ncm::SystemDataId data_id) {
         return impl::MountData(name, data_id, ncm::StorageId::BuiltInSystem);
     }
 
-    Result MountSystemData(const char *name, ncm::DataId data_id, void *cache_buffer, size_t cache_size) {
+    Result MountSystemData(const char *name, ncm::SystemDataId data_id, void *cache_buffer, size_t cache_size) {
         return impl::MountData(name, data_id, ncm::StorageId::BuiltInSystem, cache_buffer, cache_size);
     }