diff --git a/core/libs/prx/libSceSystemService/Export.cpp b/core/libs/prx/libSceSystemService/Export.cpp
index 136c434f1..b87c8a63d 100644
--- a/core/libs/prx/libSceSystemService/Export.cpp
+++ b/core/libs/prx/libSceSystemService/Export.cpp
@@ -351,8 +351,7 @@ int APS5_VABI sceSystemServiceReenableMusicPlayer(void) {
 }
 
 int APS5_VABI sceSystemServiceShowControllerSettings(void) {
- NotImplemented_nid_no_patch(__func__);
- return 0;
+ return SYSTEM_SERVICE_OK;
 }
 
 int APS5_VABI sceSystemServiceGetAppIdOfRunningBigApp(void) {
diff --git a/core/libs/tests/GuestSystemService.cpp b/core/libs/tests/GuestSystemService.cpp
index 13b062c85..f832d4a6d 100644
--- a/core/libs/tests/GuestSystemService.cpp
+++ b/core/libs/tests/GuestSystemService.cpp
@@ -42,6 +42,7 @@ extern "C" int APS5_VABI sceSystemServiceReenableMusicPlayer(void);
 extern "C" int APS5_VABI sceSystemServiceDisableMediaPlay(void);
 extern "C" int APS5_VABI sceSystemServiceReenableMediaPlay(void);
 extern "C" int APS5_VABI sceSystemServiceLaunchWebBrowser(const char* uri, void* param);
+extern "C" int APS5_VABI sceSystemServiceShowControllerSettings(void);
 
 int main() {
     Require(sceSystemServicePowerTick() == SYSTEM_SERVICE_OK);
@@ -57,6 +58,7 @@ int main() {
     Require(sceSystemServiceDisableMediaPlay() == SYSTEM_SERVICE_OK);
     Require(sceSystemServiceReenableMediaPlay() == SYSTEM_SERVICE_OK);
     Require(sceSystemServiceReenableMediaPlay() == SYSTEM_SERVICE_OK);
+    Require(sceSystemServiceShowControllerSettings() == SYSTEM_SERVICE_OK);
     Require(sceSystemServiceLaunchWebBrowser("http://127.0.0.1:8780/video?v=0", nullptr) == browserUnavailable);
     unsigned char browserParam[64];
     std::memset(browserParam, 0x5a, sizeof(browserParam));
diff --git a/docs/dev/debt/libSceSystemService.md b/docs/dev/debt/libSceSystemService.md
index 452c63a91..c53e2c817 100644
--- a/docs/dev/debt/libSceSystemService.md
+++ b/docs/dev/debt/libSceSystemService.md
@@ -4,6 +4,7 @@
 
 - [libSceSystemService](../../../core/libs/prx/libSceSystemService/Export.cpp) - `sceSystemServicePowerTick`, `sceSystemServiceReportAbnormalTermination`, `sceSystemServiceDisableMusicPlayer`, `sceSystemServiceReenableMusicPlayer`, `sceSystemServiceDisableMediaPlay` and `sceSystemServiceReenableMediaPlay` return success and do nothing: the host has no auto power-off timer to reset, no system crash reporter to notify, no system music player to pause or resume and no system media playback to disable. PPSA01521 calls `sceSystemServiceDisableMediaPlay` during start-up, and its wrappers for both pass no arguments
 - [sceSystemServiceLaunchWebBrowser](../../../core/libs/prx/libSceSystemService/Export.cpp) (libSceSystemService) - AnyPS5 launches no web browser, so the call fails and nothing is shown. RommPS PPSA76677 then tells the player to scan its QR code instead
+- [sceSystemServiceShowControllerSettings](../../../core/libs/prx/libSceSystemService/Export.cpp) (libSceSystemService) - returns success without showing the controller settings: AnyPS5 has no system UI to open. Cat Quest III (PPSA15065) imports it
 
 ### Unknown function info