diff --git a/exosphere/program/source/smc/secmon_smc_info.cpp b/exosphere/program/source/smc/secmon_smc_info.cpp
index 88cdeefe0..8c0710b04 100644
--- a/exosphere/program/source/smc/secmon_smc_info.cpp
+++ b/exosphere/program/source/smc/secmon_smc_info.cpp
@@ -271,6 +271,9 @@ namespace ams::secmon::smc {
                         std::memcpy(std::addressof(args.r[1]), std::addressof(tmp_hash), sizeof(tmp_hash));
                     }
                     break;
+                case ConfigItem::Unknown18:
+                    args.r[1] = GetBootConfig().data.GetUnknown70();
+                    break;
                 case ConfigItem::ExosphereApiVersion:
                     /* Get information about the current exosphere version. */
                     if (kern || g_set_true_target_firmware) {
diff --git a/exosphere/program/source/smc/secmon_smc_info.hpp b/exosphere/program/source/smc/secmon_smc_info.hpp
index 605bbf333..2f81d066d 100644
--- a/exosphere/program/source/smc/secmon_smc_info.hpp
+++ b/exosphere/program/source/smc/secmon_smc_info.hpp
@@ -38,6 +38,7 @@ namespace ams::secmon::smc {
         RegulatorType                 = 15,
         DeviceUniqueKeyGeneration     = 16,
         Package2Hash                  = 17,
+        Unknown18                     = 18,
 
         /* Extension config items for exosphere. */
         ExosphereApiVersion            = 65000,
diff --git a/libraries/libexosphere/include/exosphere/pkg1/pkg1_boot_config.hpp b/libraries/libexosphere/include/exosphere/pkg1/pkg1_boot_config.hpp
index b61fb7e07..f7a67a1ec 100644
--- a/libraries/libexosphere/include/exosphere/pkg1/pkg1_boot_config.hpp
+++ b/libraries/libexosphere/include/exosphere/pkg1/pkg1_boot_config.hpp
@@ -61,14 +61,15 @@ namespace ams::pkg1 {
     }
 
     struct BootConfigData {
-        u32 version;
-        u32 reserved_04;
+        u64 version;
         u32 reserved_08;
         u32 reserved_0C;
         u8 flags1[0x10];
         u8 flags0[0x10];
         u64 initial_tsc_value;
-        u8 padding_38[0x200 - 0x38];
+        u8 padding_38[0x38];
+        u64 unknown_70;
+        u8 padding_78[0x200 - 0x78];
 
         constexpr bool IsDevelopmentFunctionEnabled() const {
             return (this->flags1[0] & (1 << 1)) != 0;
@@ -97,13 +98,16 @@ namespace ams::pkg1 {
         constexpr u64 GetInitialTscValue() const {
             return this->IsInitialTscValueValid() ? this->initial_tsc_value : 0;
         }
+        
+        constexpr u64 GetUnknown70() const {
+            return this->unknown_70;
+        }
     };
     static_assert(util::is_pod<BootConfigData>::value);
     static_assert(sizeof(BootConfigData) == 0x200);
 
     struct BootConfigSignedData {
-        u32 version;
-        u32 reserved_04;
+        u64 version;
         u8  flags;
         u8  reserved_09[0x10 - 9];
         u8  ecid[0x10];
diff --git a/libraries/libstratosphere/include/stratosphere/spl/spl_types.hpp b/libraries/libstratosphere/include/stratosphere/spl/spl_types.hpp
index 11c80ad48..65c25fe58 100644
--- a/libraries/libstratosphere/include/stratosphere/spl/spl_types.hpp
+++ b/libraries/libstratosphere/include/stratosphere/spl/spl_types.hpp
@@ -230,6 +230,7 @@ namespace ams::spl {
         RegulatorType                 = 15,
         DeviceUniqueKeyGeneration     = 16,
         Package2Hash                  = 17,
+        Unknown18                     = 18,
 
         /* Extension config items for exosphere. */
         ExosphereApiVersion            = 65000,