diff --git a/src/core/libraries/app_content/app_content.cpp b/src/core/libraries/app_content/app_content.cpp
index ca3cdad3..1d23e7f4 100644
--- a/src/core/libraries/app_content/app_content.cpp
+++ b/src/core/libraries/app_content/app_content.cpp
@@ -145,8 +145,10 @@ int PS4_SYSV_ABI sceAppContentDownloadDataFormat() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceAppContentDownloadDataGetAvailableSpaceKb() {
+int PS4_SYSV_ABI sceAppContentDownloadDataGetAvailableSpaceKb(OrbisAppContentMountPoint* mountPoint,
+                                                              u64* availableSpaceKb) {
     LOG_ERROR(Lib_AppContent, "(STUBBED) called");
+    *availableSpaceKb = 1048576;
     return ORBIS_OK;
 }
 
@@ -294,9 +296,9 @@ int PS4_SYSV_ABI sceAppContentTemporaryDataFormat() {
 }
 
 int PS4_SYSV_ABI sceAppContentTemporaryDataGetAvailableSpaceKb(
-    const OrbisAppContentMountPoint* mountPoint, size_t* availableSpaceKb) {
+    const OrbisAppContentMountPoint* mountPoint, u64* availableSpaceKb) {
     LOG_ERROR(Lib_AppContent, "(STUBBED) called");
-    *availableSpaceKb = 1073741824;
+    *availableSpaceKb = 1048576;
     return ORBIS_OK;
 }
 
diff --git a/src/core/libraries/app_content/app_content.h b/src/core/libraries/app_content/app_content.h
index f41f7dcc..05bd3bc4 100644
--- a/src/core/libraries/app_content/app_content.h
+++ b/src/core/libraries/app_content/app_content.h
@@ -84,7 +84,8 @@ int PS4_SYSV_ABI sceAppContentDownload0Shrink();
 int PS4_SYSV_ABI sceAppContentDownload1Expand();
 int PS4_SYSV_ABI sceAppContentDownload1Shrink();
 int PS4_SYSV_ABI sceAppContentDownloadDataFormat();
-int PS4_SYSV_ABI sceAppContentDownloadDataGetAvailableSpaceKb();
+int PS4_SYSV_ABI sceAppContentDownloadDataGetAvailableSpaceKb(OrbisAppContentMountPoint* mountPoint,
+                                                              u64* availableSpaceKb);
 int PS4_SYSV_ABI sceAppContentGetAddcontDownloadProgress();
 int PS4_SYSV_ABI sceAppContentGetAddcontInfo(u32 service_label,
                                              const OrbisNpUnifiedEntitlementLabel* entitlementLabel,
@@ -105,7 +106,7 @@ int PS4_SYSV_ABI sceAppContentSmallSharedDataMount();
 int PS4_SYSV_ABI sceAppContentSmallSharedDataUnmount();
 int PS4_SYSV_ABI sceAppContentTemporaryDataFormat();
 int PS4_SYSV_ABI sceAppContentTemporaryDataGetAvailableSpaceKb(
-    const OrbisAppContentMountPoint* mountPoint, size_t* availableSpaceKb);
+    const OrbisAppContentMountPoint* mountPoint, u64* availableSpaceKb);
 int PS4_SYSV_ABI sceAppContentTemporaryDataMount();
 int PS4_SYSV_ABI sceAppContentTemporaryDataMount2(OrbisAppContentTemporaryDataOption option,
                                                   OrbisAppContentMountPoint* mountPoint);