diff --git a/dlls/msi/install.c b/dlls/msi/install.c
index 8724c95b039..cb43403a675 100644
--- a/dlls/msi/install.c
+++ b/dlls/msi/install.c
@@ -30,6 +30,7 @@
 #include "msidefs.h"
 #include "msipriv.h"
 #include "action.h"
+#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msi);
 
@@ -760,3 +761,30 @@ LANGID WINAPI MsiGetLanguage(MSIHANDLE hInstall)
     msiobj_release( &package->hdr );
     return langid;
 }
+
+/***********************************************************************
+ * MsiGetLanguage (MSI.@)
+ */
+UINT WINAPI MsiSetInstallLevel(MSIHANDLE hInstall, int iInstallLevel)
+{
+    static const WCHAR szInstallLevel[] = {
+        'I','N','S','T','A','L','L','L','E','V','E','L',0 };
+    static const WCHAR fmt[] = { '%','d',0 };
+    MSIPACKAGE* package;
+    WCHAR level[6];
+    UINT r;
+
+    TRACE("%ld %i\n", hInstall, iInstallLevel);
+
+    if (iInstallLevel<1 || iInstallLevel>32767)
+        return ERROR_INVALID_PARAMETER;
+
+    package = msihandle2msiinfo( hInstall, MSIHANDLETYPE_PACKAGE );
+    if ( !package )
+        return ERROR_INVALID_HANDLE;
+
+    sprintfW( level, fmt, iInstallLevel );
+    r = MSI_SetPropertyW( package, szInstallLevel, level );
+    msiobj_release( &package->hdr );
+    return r;
+}
diff --git a/dlls/msi/msi.spec b/dlls/msi/msi.spec
index 8dfade16290..d6963190013 100644
--- a/dlls/msi/msi.spec
+++ b/dlls/msi/msi.spec
@@ -133,7 +133,7 @@
 137 stdcall MsiSetExternalUIW(ptr long ptr)
 138 stdcall MsiSetFeatureStateA(long str long)
 139 stdcall MsiSetFeatureStateW(long wstr long)
-140 stub MsiSetInstallLevel
+140 stdcall MsiSetInstallLevel(long long)
 141 stdcall MsiSetInternalUI(long ptr)
 142 stub MsiVerifyDiskSpace
 143 stdcall MsiSetMode(long long long)