diff --git a/dlls/msi/automation.c b/dlls/msi/automation.c
index 07994e10c5e..169ad813b90 100644
--- a/dlls/msi/automation.c
+++ b/dlls/msi/automation.c
@@ -686,6 +686,14 @@ static HRESULT WINAPI SessionImpl_Invoke(
 
     switch (dispIdMember)
     {
+	case DISPID_SESSION_INSTALLER:
+	    if (wFlags & DISPATCH_PROPERTYGET) {
+                V_VT(pVarResult) = VT_DISPATCH;
+                IDispatch_AddRef(This->pInstaller);
+                V_DISPATCH(pVarResult) = This->pInstaller;
+	    }
+	    break;
+
 	case DISPID_SESSION_PROPERTY:
 	    if (wFlags & DISPATCH_PROPERTYGET) {
                 hr = DispGetParam(pDispParams, 0, VT_BSTR, &varg0, puArgErr);
diff --git a/dlls/msi/msiserver.idl b/dlls/msi/msiserver.idl
index 4d6c00b6759..09ea7c74b66 100644
--- a/dlls/msi/msiserver.idl
+++ b/dlls/msi/msiserver.idl
@@ -163,6 +163,8 @@ library WindowsInstaller
     {
     properties:
     methods:
+        [id(DISPID_SESSION_INSTALLER), propget]
+            Installer *Installer();
         [id(DISPID_SESSION_PROPERTY), propget]
             BSTR Property([in] BSTR PropertyName);
         [id(DISPID_SESSION_PROPERTY), propput]
diff --git a/dlls/msi/msiserver_dispids.h b/dlls/msi/msiserver_dispids.h
index 1c7a17f5af3..e5efa3eedcd 100644
--- a/dlls/msi/msiserver_dispids.h
+++ b/dlls/msi/msiserver_dispids.h
@@ -26,6 +26,7 @@
 
 #define DISPID_DATABASE_OPENVIEW 3
 
+#define DISPID_SESSION_INSTALLER 1
 #define DISPID_SESSION_PROPERTY 2
 #define DISPID_SESSION_LANGUAGE 3
 #define DISPID_SESSION_MODE 4
diff --git a/dlls/msi/tests/automation.c b/dlls/msi/tests/automation.c
index d4977ab1bf1..91e7b9a8eca 100644
--- a/dlls/msi/tests/automation.c
+++ b/dlls/msi/tests/automation.c
@@ -908,12 +908,10 @@ static void test_Session(IDispatch *pSession)
     HRESULT hr;
 
     /* Session::Installer */
-    todo_wine {
-        hr = Session_Installer(pSession, &pInst);
-        ok(SUCCEEDED(hr), "Session_Installer failed, hresult 0x%08x\n", hr);
-        ok(pInst != NULL, "Session_Installer returned NULL IDispatch pointer\n");
-        ok(pInst == pInstaller, "Session_Installer does not match Installer instance from CoCreateInstance\n");
-    }
+    hr = Session_Installer(pSession, &pInst);
+    ok(SUCCEEDED(hr), "Session_Installer failed, hresult 0x%08x\n", hr);
+    ok(pInst != NULL, "Session_Installer returned NULL IDispatch pointer\n");
+    ok(pInst == pInstaller, "Session_Installer does not match Installer instance from CoCreateInstance\n");
 
     /* Session::Property, get */
     memset(stringw, 0, sizeof(stringw));