diff --git a/src/xenia/kernel/xam_user.cc b/src/xenia/kernel/xam_user.cc
index 4524d743a..300cbf07b 100644
--- a/src/xenia/kernel/xam_user.cc
+++ b/src/xenia/kernel/xam_user.cc
@@ -218,6 +218,46 @@ SHIM_CALL XamUserReadProfileSettings_shim(
 }
 
 
+SHIM_CALL XamUserWriteProfileSettings_shim(
+    PPCContext* ppc_state, KernelState* state) {
+  uint32_t user_index = SHIM_GET_ARG_32(0);
+  uint32_t unknown = SHIM_GET_ARG_32(1);
+  uint32_t setting_count = SHIM_GET_ARG_32(2);
+  uint32_t settings_ptr = SHIM_GET_ARG_32(3);
+  uint32_t overlapped_ptr = SHIM_GET_ARG_32(4);
+  
+  XELOGD(
+    "XamUserWriteProfileSettings(%.8X, %d, %d, %d, %d, %.8X, %.8X(%d), %.8X, %.8X)",
+    user_index, unknown, setting_count, settings_ptr, overlapped_ptr);
+
+  if (!setting_count || !settings_ptr) {
+    SHIM_SET_RETURN_32(X_ERROR_INVALID_PARAMETER);
+  }
+
+  if (user_index == 255) {
+    user_index = 0;
+  }
+
+  if (user_index) {
+    // Only support user 0.
+    SHIM_SET_RETURN_32(X_ERROR_NOT_FOUND);
+    return;
+  }
+
+  const auto& user_profile = state->user_profile();
+
+  // TODO: Update and save settings.
+
+  if (overlapped_ptr) {
+    state->CompleteOverlappedImmediate(overlapped_ptr, X_ERROR_SUCCESS);
+    SHIM_SET_RETURN_32(X_ERROR_IO_PENDING);
+  }
+  else {
+    SHIM_SET_RETURN_32(X_ERROR_SUCCESS);
+  }
+}
+
+
 SHIM_CALL XamUserCheckPrivilege_shim(
     PPCContext* ppc_state, KernelState* state) {
   uint32_t user_index = SHIM_GET_ARG_32(0);
@@ -310,6 +350,7 @@ void xe::kernel::xam::RegisterUserExports(
   SHIM_SET_MAPPING("xam.xex", XamUserGetSigninInfo, state);
   SHIM_SET_MAPPING("xam.xex", XamUserGetName, state);
   SHIM_SET_MAPPING("xam.xex", XamUserReadProfileSettings, state);
+  SHIM_SET_MAPPING("xam.xex", XamUserWriteProfileSettings, state);
   SHIM_SET_MAPPING("xam.xex", XamUserCheckPrivilege, state);
   SHIM_SET_MAPPING("xam.xex", XamShowSigninUI, state);
   SHIM_SET_MAPPING("xam.xex", XamUserCreateAchievementEnumerator, state);
diff --git a/src/xenia/xbox.h b/src/xenia/xbox.h
index 52bc8f31e..b3ca8dd24 100644
--- a/src/xenia/xbox.h
+++ b/src/xenia/xbox.h
@@ -68,6 +68,7 @@ typedef uint32_t X_RESULT;
 #define X_ERROR_ACCESS_DENIED                           X_HRESULT_FROM_WIN32(0x00000005L)
 #define X_ERROR_INVALID_HANDLE                          X_HRESULT_FROM_WIN32(0x00000006L)
 #define X_ERROR_NO_MORE_FILES                           X_HRESULT_FROM_WIN32(0x00000018L)
+#define X_ERROR_INVALID_PARAMETER                       X_HRESULT_FROM_WIN32(0x00000057L)
 #define X_ERROR_IO_PENDING                              X_HRESULT_FROM_WIN32(0x000003E5L)
 #define X_ERROR_INSUFFICIENT_BUFFER                     X_HRESULT_FROM_WIN32(0x0000007AL)
 #define X_ERROR_BAD_ARGUMENTS                           X_HRESULT_FROM_WIN32(0x000000A0L)