diff --git a/core/libs/prx/libkernel/DirectMemory/PosixMemory.cpp b/core/libs/prx/libkernel/DirectMemory/PosixMemory.cpp
index 12b4b4d97..4ebb4d4d5 100644
--- a/core/libs/prx/libkernel/DirectMemory/PosixMemory.cpp
+++ b/core/libs/prx/libkernel/DirectMemory/PosixMemory.cpp
@@ -1,6 +1,7 @@
 #include "DirectMemory.hpp"
 #include "SceTypes.hpp"
 #include "prx/libc/include/general/VabiMacros.hpp"
+#include "prx/libc/include/General.hpp"
 #include <limits>
 #include <new>
 #include <stdexcept>
@@ -19,6 +20,9 @@ constexpr int GuestPrivate = 0x2;
 constexpr int GuestAnonymous = 0x1000;
 constexpr int GuestSyncAsync = 0x1;
 constexpr int GuestSyncInvalidate = 0x2;
+constexpr int GuestAdviceCore = 9;
+constexpr int GuestAdviceProtect = 10;
+constexpr std::uintptr_t GuestUserAddressEnd = 0x800000000000;
 
 bool RoundLength(std::size_t length, std::size_t& rounded) {
     constexpr auto mask = PS5_PAGE_SIZE - 1;
@@ -149,4 +153,14 @@ int APS5_VABI msync_nid_postfix(void* address, std::size_t length, int flags) {
     return 0;
 }
 
+int APS5_VABI madvise_nid_postfix(void* address, std::size_t length, int advice) {
+    if (advice == GuestAdviceProtect) NotImplemented_nid_no_patch("madvise MADV_PROTECT");
+    const auto start = reinterpret_cast<std::uintptr_t>(address);
+    if (advice < 0 || advice > GuestAdviceCore || start > GuestUserAddressEnd || length > GuestUserAddressEnd - start) {
+        SetError(GuestInvalid);
+        return -1;
+    }
+    return 0;
+}
+
 }
diff --git a/core/libs/tests/GuestMemory.cpp b/core/libs/tests/GuestMemory.cpp
index 892cefb40..93e95a3e3 100644
--- a/core/libs/tests/GuestMemory.cpp
+++ b/core/libs/tests/GuestMemory.cpp
@@ -37,6 +37,7 @@ extern "C" {
 void* APS5_VABI mmap_nid_postfix(void*, std::size_t, int, int, int, std::int64_t) noexcept;
 int APS5_VABI munmap_nid_postfix(void*, std::size_t) noexcept;
 int APS5_VABI mprotect_nid_postfix(void*, std::size_t, int) noexcept;
+int APS5_VABI madvise_nid_postfix(void*, std::size_t, int);
 int* APS5_VABI __error_nid_postfix();
 int APS5_VABI sceKernelMapNamedFlexibleMemory(void**, std::size_t, int, int, const char*);
 int APS5_VABI sceKernelMapNamedFlexibleMemoryInternal(void**, std::size_t, int, int, const char*);
@@ -1136,6 +1137,19 @@ int main() {
         GuestAllocations::Mutation mutation;
         Require(mutation.Find(memory).writable);
     }
+    for (int advice = 0; advice <= 9; ++advice) Require(madvise_nid_postfix(memory, page * 3, advice) == 0);
+    Require(memory[0] == 42 && memory[page * 2] == 73);
+    Require(madvise_nid_postfix(memory + 1, 0, 4) == 0);
+    Require(madvise_nid_postfix(memory, page, 11) == -1 && *__error_nid_postfix() == 22);
+    *__error_nid_postfix() = 0;
+    Require(madvise_nid_postfix(memory, page, -1) == -1 && *__error_nid_postfix() == 22);
+    *__error_nid_postfix() = 0;
+    Require(madvise_nid_postfix(memory, 0, 11) == -1 && *__error_nid_postfix() == 22);
+    *__error_nid_postfix() = 0;
+    Require(madvise_nid_postfix(memory, std::numeric_limits<std::size_t>::max(), 0) == -1 && *__error_nid_postfix() == 22);
+    *__error_nid_postfix() = 0;
+    Require(madvise_nid_postfix(reinterpret_cast<void*>(0x800000000000), 1, 0) == -1 && *__error_nid_postfix() == 22);
+    Require(madvise_nid_postfix(reinterpret_cast<void*>(0x7fffffffc000), 0x4000, 4) == 0);
     Require(munmap_nid_postfix(memory + 1, page) == -1 && *__error_nid_postfix() == 22);
     Require(munmap_nid_postfix(memory, 0) == -1 && *__error_nid_postfix() == 22);
     Require(memory[0] == 42);
@@ -1145,6 +1159,7 @@ int main() {
     Require(memory[page * 2] == 73);
     Require(munmap_nid_postfix(memory + page * 2, page) == 0);
     Require(munmap_nid_postfix(memory, page) == -1);
+    Require(madvise_nid_postfix(memory, page, 4) == 0);
     *__error_nid_postfix() = 0;
     Require(mprotect_nid_postfix(memory, page, 1) == -1 && *__error_nid_postfix() == 22);
     *__error_nid_postfix() = 0;