diff --git a/dlls/msi/automation.c b/dlls/msi/automation.c
index 1c717baec75..4cd7ba9efd5 100644
--- a/dlls/msi/automation.c
+++ b/dlls/msi/automation.c
@@ -1400,6 +1400,55 @@ static HRESULT WINAPI InstallerImpl_Invoke(
             else return DISP_E_MEMBERNOTFOUND;
             break;
 
+        case DISPID_INSTALLER_RELATEDPRODUCTS:
+            if (wFlags & DISPATCH_PROPERTYGET)
+            {
+                StringListData *sldata = NULL;
+                int idx = 0;
+                WCHAR szProductBuf[GUID_SIZE];
+
+                hr = DispGetParam(pDispParams, 0, VT_BSTR, &varg0, puArgErr);
+                if (FAILED(hr)) return hr;
+
+                /* Find number of related products */
+                do {
+                    ret = MsiEnumRelatedProductsW(V_BSTR(&varg0), 0, idx, szProductBuf);
+                    if (ret == ERROR_SUCCESS) idx++;
+                } while (ret == ERROR_SUCCESS);
+
+                if (ret != ERROR_SUCCESS && ret != ERROR_NO_MORE_ITEMS)
+                {
+                    VariantClear(&varg0);
+                    ERR("MsiEnumRelatedProducts returned %d\n", ret);
+                    return DISP_E_EXCEPTION;
+                }
+
+                V_VT(pVarResult) = VT_DISPATCH;
+                if (SUCCEEDED(hr = create_automation_object(0, NULL, (LPVOID*)&pDispatch, &DIID_StringList, StringListImpl_Invoke, StringListImpl_Free, sizeof(StringListData))))
+                {
+                    IDispatch_AddRef(pDispatch);
+                    V_DISPATCH(pVarResult) = pDispatch;
+
+                    /* Save product strings */
+                    sldata = (StringListData *)private_data((AutomationObject *)pDispatch);
+                    if (!(sldata->pszStrings = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(LPWSTR)*sldata->iCount)))
+                        ERR("Out of memory\n");
+                    else
+                    {
+                        sldata->iCount = idx;
+                        for (idx = 0; idx < sldata->iCount; idx++)
+                        {
+                            ret = MsiEnumRelatedProductsW(V_BSTR(&varg0), 0, idx, szProductBuf);
+                            sldata->pszStrings[idx] = SysAllocString(szProductBuf);
+                        }
+                    }
+                }
+                else
+                    ERR("Failed to create StringList object, hresult 0x%08x\n", hr);
+            }
+            else return DISP_E_MEMBERNOTFOUND;
+            break;
+
          default:
             return DISP_E_MEMBERNOTFOUND;
     }
diff --git a/dlls/msi/msiserver.idl b/dlls/msi/msiserver.idl
index d453d7b6f41..5721319eddb 100644
--- a/dlls/msi/msiserver.idl
+++ b/dlls/msi/msiserver.idl
@@ -79,6 +79,9 @@ library WindowsInstaller
                 [in] BSTR Product);
         [id(DISPID_INSTALLER_PRODUCTS), propget]
             StringList *Products();
+        [id(DISPID_INSTALLER_RELATEDPRODUCTS), propget]
+            StringList *RelatedProducts(
+                [in] BSTR UpgradeCode);
     }
 
     [ uuid(000C1093-0000-0000-C000-000000000046) ]
diff --git a/dlls/msi/msiserver_dispids.h b/dlls/msi/msiserver_dispids.h
index ee18a44ac0e..92c342930e5 100644
--- a/dlls/msi/msiserver_dispids.h
+++ b/dlls/msi/msiserver_dispids.h
@@ -22,6 +22,7 @@
 #define DISPID_INSTALLER_REGISTRYVALUE 11
 #define DISPID_INSTALLER_PRODUCTSTATE 17
 #define DISPID_INSTALLER_PRODUCTS 35
+#define DISPID_INSTALLER_RELATEDPRODUCTS 40
 
 #define DISPID_RECORD_FIELDCOUNT 0
 #define DISPID_RECORD_STRINGDATA 1
diff --git a/dlls/msi/tests/automation.c b/dlls/msi/tests/automation.c
index a9da690b1ba..267d7567128 100644
--- a/dlls/msi/tests/automation.c
+++ b/dlls/msi/tests/automation.c
@@ -466,7 +466,9 @@ static void test_dispid(void)
     ok( get_dispid( pInstaller, "Components" ) == 37, "dispid wrong\n");
     ok( get_dispid( pInstaller, "ComponentClients" ) == 38, "dispid wrong\n");
     ok( get_dispid( pInstaller, "Patches" ) == 39, "dispid wrong\n");
+    }
     ok( get_dispid( pInstaller, "RelatedProducts" ) == 40, "dispid wrong\n");
+    todo_wine {
     ok( get_dispid( pInstaller, "PatchInfo" ) == 41, "dispid wrong\n");
     ok( get_dispid( pInstaller, "PatchTransforms" ) == 42, "dispid wrong\n");
     ok( get_dispid( pInstaller, "AddSource" ) == 43, "dispid wrong\n");
@@ -1667,24 +1669,22 @@ static void test_Installer_InstallProduct(LPCWSTR szPath)
     ok(iValue == INSTALLSTATE_DEFAULT, "Installer_ProductState returned %d, expected %d\n", iValue, INSTALLSTATE_DEFAULT);
 
     /* Installer::RelatedProducts for our upgrade code */
-    todo_wine {
-        hr = Installer_RelatedProducts(szUpgradeCode, &pStringList);
-        ok(SUCCEEDED(hr), "Installer_RelatedProducts failed, hresult 0x%08x\n", hr);
-        if (SUCCEEDED(hr))
-        {
-            /* StringList::Count */
-            hr = StringList_Count(pStringList, &iCount);
-            ok(SUCCEEDED(hr), "StringList_Count failed, hresult 0x%08x\n", hr);
-            ok(iCount == 1, "Expected one related product but found %d\n", iCount);
+    hr = Installer_RelatedProducts(szUpgradeCode, &pStringList);
+    ok(SUCCEEDED(hr), "Installer_RelatedProducts failed, hresult 0x%08x\n", hr);
+    if (SUCCEEDED(hr))
+    {
+        /* StringList::Count */
+        hr = StringList_Count(pStringList, &iCount);
+        ok(SUCCEEDED(hr), "StringList_Count failed, hresult 0x%08x\n", hr);
+        todo_wine ok(iCount == 1, "Expected one related product but found %d\n", iCount);
 
-            /* StringList::Item */
-            memset(szString, 0, sizeof(szString));
-            hr = StringList_Item(pStringList, 0, szString);
-            ok(SUCCEEDED(hr), "StringList_Item failed (idx 0, count %d), hresult 0x%08x\n", iCount, hr);
-            ok_w2("StringList_Item returned %s but expected %s\n", szString, szProductCode);
+        /* StringList::Item */
+        memset(szString, 0, sizeof(szString));
+        hr = StringList_Item(pStringList, 0, szString);
+        todo_wine ok(SUCCEEDED(hr), "StringList_Item failed (idx 0, count %d), hresult 0x%08x\n", iCount, hr);
+        todo_wine ok_w2("StringList_Item returned %s but expected %s\n", szString, szProductCode);
 
-            IDispatch_Release(pStringList);
-        }
+        IDispatch_Release(pStringList);
     }
 
     /* Check & clean up installed files & registry keys */
@@ -1889,18 +1889,16 @@ static void test_Installer(void)
         ok(iValue == INSTALLSTATE_UNKNOWN, "Installer_ProductState returned %d, expected %d\n", iValue, INSTALLSTATE_UNKNOWN);
 
     /* Installer::RelatedProducts for our upgrade code, should not find anything */
-    todo_wine {
-        hr = Installer_RelatedProducts(szUpgradeCode, &pStringList);
-        ok(SUCCEEDED(hr), "Installer_RelatedProducts failed, hresult 0x%08x\n", hr);
-        if (SUCCEEDED(hr))
-        {
-            /* StringList::Count */
-            hr = StringList_Count(pStringList, &iCount);
-            ok(SUCCEEDED(hr), "StringList_Count failed, hresult 0x%08x\n", hr);
-            ok(!iCount, "Expected no related products but found %d\n", iCount);
+    hr = Installer_RelatedProducts(szUpgradeCode, &pStringList);
+    ok(SUCCEEDED(hr), "Installer_RelatedProducts failed, hresult 0x%08x\n", hr);
+    if (SUCCEEDED(hr))
+    {
+        /* StringList::Count */
+        hr = StringList_Count(pStringList, &iCount);
+        ok(SUCCEEDED(hr), "StringList_Count failed, hresult 0x%08x\n", hr);
+        ok(!iCount, "Expected no related products but found %d\n", iCount);
 
-            IDispatch_Release(pStringList);
-        }
+        IDispatch_Release(pStringList);
     }
 
     /* Installer::Version */