diff --git a/core/libs/prx/libSceAppContent/Export.cpp b/core/libs/prx/libSceAppContent/Export.cpp
index d36481e95..5f56318a1 100644
--- a/core/libs/prx/libSceAppContent/Export.cpp
+++ b/core/libs/prx/libSceAppContent/Export.cpp
@@ -172,9 +172,10 @@ int APS5_VABI sceAppContentTemporaryDataUnmount(const AppContentMountPoint* moun
 }
 
 
-int APS5_VABI sceAppContentAddcontEnqueueDownload(void) {
-    NotImplemented_nid_no_patch(__func__);
-    return 0;
+int APS5_VABI sceAppContentAddcontEnqueueDownload(uint32_t service_label, const NpUnifiedEntitlementLabel* entitlement_label) {
+    (void)service_label;
+    if (!entitlement_label) return SCE_APP_CONTENT_ERROR_PARAMETER;
+    return SCE_APP_CONTENT_ERROR_NOT_FOUND;
 }
 
 int APS5_VABI sceAppContentGetAddcontDownloadProgress(void) {
diff --git a/core/libs/tests/GuestAppContent.cpp b/core/libs/tests/GuestAppContent.cpp
index 93154a94e..1f68eaec0 100644
--- a/core/libs/tests/GuestAppContent.cpp
+++ b/core/libs/tests/GuestAppContent.cpp
@@ -10,6 +10,7 @@ extern "C" {
 int APS5_VABI sceAppContentInitialize(const AppContentInitParam*, AppContentBootParam*);
 int APS5_VABI sceAppContentAddcontMount(uint32_t, const NpUnifiedEntitlementLabel*, AppContentMountPoint*);
 int APS5_VABI sceAppContentAddcontUnmount(const AppContentMountPoint*);
+int APS5_VABI sceAppContentAddcontEnqueueDownload(uint32_t, const NpUnifiedEntitlementLabel*);
 int APS5_VABI sceAppContentTemporaryDataMount2(uint32_t, AppContentMountPoint*);
 int APS5_VABI sceAppContentTemporaryDataUnmount(const AppContentMountPoint*);
 int APS5_VABI sceAppContentTemporaryDataFormat(const AppContentMountPoint*);
@@ -82,6 +83,10 @@ int main() {
     std::memcpy(mountPoint.data, "/addcont0", 10);
     Require(sceAppContentAddcontUnmount(&mountPoint) == ErrorNotFound);
     Require(sceAppContentAddcontUnmount(nullptr) == ErrorParameter);
+    Require(sceAppContentAddcontEnqueueDownload(0, &label) == ErrorNotFound);
+    Require(sceAppContentAddcontEnqueueDownload(7, &label) == ErrorNotFound);
+    Require(sceAppContentAddcontEnqueueDownload(0, nullptr) == ErrorParameter);
+    Require(sceAppContentAddcontMount(0, &label, &mountPoint) == ErrorNotFound);
 
     std::filesystem::create_directory(directory / "temp0");
     { std::ofstream file(directory / "temp0" / "old.txt"); file << "previous run"; }