diff --git a/core/libs/prx/libSceHmd/Export.cpp b/core/libs/prx/libSceHmd/Export.cpp
index 0112025f52..e90bf60b5b 100644
--- a/core/libs/prx/libSceHmd/Export.cpp
+++ b/core/libs/prx/libSceHmd/Export.cpp
@@ -120,8 +120,7 @@ int APS5_VABI sceHmdInternalGetDebugTextMode(void) {
 }
 
 int APS5_VABI sceHmdDistortionGetWorkMemoryAlign(void) {
-    NotImplemented_nid_no_patch(__func__);
-    return 0;
+    return 0x400;
 }
 
 int APS5_VABI sceHmdInternalRegisterEventCallback(void) {
@@ -130,8 +129,7 @@ int APS5_VABI sceHmdInternalRegisterEventCallback(void) {
 }
 
 int APS5_VABI sceHmdDistortionGetWorkMemorySize(void) {
-    NotImplemented_nid_no_patch(__func__);
-    return 0;
+    return 0x20000;
 }
 
 int APS5_VABI sceHmdReprojectionStartWideNear(void) {
@@ -340,8 +338,7 @@ int APS5_VABI sceHmdDistortionGetCorrectionCommand(void) {
 }
 
 int APS5_VABI sceHmdReprojectionQueryOnionBuffAlign(void) {
-    NotImplemented_nid_no_patch(__func__);
-    return 0;
+    return 0x100;
 }
 
 int APS5_VABI sceHmdInternalGetDebugMode(void) {
@@ -450,8 +447,7 @@ int APS5_VABI sceHmdInternalDfuClose(void) {
 }
 
 int APS5_VABI sceHmdReprojectionQueryGarlicBuffAlign(void) {
-    NotImplemented_nid_no_patch(__func__);
-    return 0;
+    return 0x100;
 }
 
 int APS5_VABI sceHmdInternalSetHmuPowerControl(void) {
@@ -680,8 +676,7 @@ int APS5_VABI sceHmdInternalResetLedForVrTracker(void) {
 }
 
 int APS5_VABI sceHmdReprojectionQueryOnionBuffSize(void) {
-    NotImplemented_nid_no_patch(__func__);
-    return 0;
+    return 0x810;
 }
 
 int APS5_VABI sceHmdReprojectionStartWithOverlay(void) {
@@ -855,8 +850,7 @@ int APS5_VABI sceHmdInternalGetPuRevision(void) {
 }
 
 int APS5_VABI sceHmdReprojectionQueryGarlicBuffSize(void) {
-    NotImplemented_nid_no_patch(__func__);
-    return 0;
+    return 0x100000;
 }
 
 int APS5_VABI sceHmdGet2dVrCommand(void) {
diff --git a/core/libs/prx/libSceHmd/Hmd.hpp b/core/libs/prx/libSceHmd/Hmd.hpp
index cfbb52bff6..2daaf92e9b 100644
--- a/core/libs/prx/libSceHmd/Hmd.hpp
+++ b/core/libs/prx/libSceHmd/Hmd.hpp
@@ -63,6 +63,12 @@ std::int32_t APS5_VABI sceHmdGetDeviceInformationByHandle(std::int32_t handle,
                                                         Hmd::DeviceInformation* info);
 std::int32_t APS5_VABI sceHmdInternalGetDeviceStatus(Hmd::DeviceStatus* status);
 std::int32_t APS5_VABI sceHmdInternalMmapIsConnect();
+int APS5_VABI sceHmdDistortionGetWorkMemoryAlign(void);
+int APS5_VABI sceHmdDistortionGetWorkMemorySize(void);
+int APS5_VABI sceHmdReprojectionQueryGarlicBuffAlign(void);
+int APS5_VABI sceHmdReprojectionQueryGarlicBuffSize(void);
+int APS5_VABI sceHmdReprojectionQueryOnionBuffAlign(void);
+int APS5_VABI sceHmdReprojectionQueryOnionBuffSize(void);
 }
 
 #endif
diff --git a/core/libs/tests/GuestHmd.cpp b/core/libs/tests/GuestHmd.cpp
index 6b97bea9cc..6cdaa32c4e 100644
--- a/core/libs/tests/GuestHmd.cpp
+++ b/core/libs/tests/GuestHmd.cpp
@@ -22,6 +22,15 @@ void CheckDisconnected() {
     Require(sceHmdInternalMmapIsConnect() == 0, "connection reported present");
 }
 
+void CheckBufferQueries() {
+    Require(sceHmdDistortionGetWorkMemoryAlign() == 0x400, "distortion work memory alignment");
+    Require(sceHmdDistortionGetWorkMemorySize() == 0x20000, "distortion work memory size");
+    Require(sceHmdReprojectionQueryGarlicBuffAlign() == 0x100, "reprojection garlic buffer alignment");
+    Require(sceHmdReprojectionQueryGarlicBuffSize() == 0x100000, "reprojection garlic buffer size");
+    Require(sceHmdReprojectionQueryOnionBuffAlign() == 0x100, "reprojection onion buffer alignment");
+    Require(sceHmdReprojectionQueryOnionBuffSize() == 0x810, "reprojection onion buffer size");
+}
+
 }
 
 int main() {
@@ -31,6 +40,7 @@ int main() {
     const auto untouched = info;
 
     CheckDisconnected();
+    CheckBufferQueries();
     Require(sceHmdTerminate() == Hmd::NotInitialized, "terminate before initialize");
     Require(sceHmdOpen(1, 0, 0, nullptr) == Hmd::NotInitialized, "open before initialize");
     Require(sceHmdClose(0) == Hmd::NotInitialized, "close before initialize");