diff --git a/dlls/msdaps/usrmarshal.c b/dlls/msdaps/usrmarshal.c
index 281b1f709a9..917b42668c0 100644
--- a/dlls/msdaps/usrmarshal.c
+++ b/dlls/msdaps/usrmarshal.c
@@ -209,7 +209,7 @@ HRESULT __RPC_STUB IDBDataSourceAdmin_ModifyDataSource_Stub(IDBDataSourceAdmin*
 
 HRESULT CALLBACK ISessionProperties_GetProperties_Proxy(ISessionProperties* This, ULONG cPropertyIDSets,
                                                         const DBPROPIDSET rgPropertyIDSets[], ULONG *pcPropertySets,
-                                                        const DBPROPSET **prgPropertySets)
+                                                        DBPROPSET **prgPropertySets)
 {
     FIXME("(%p, %d, %p, %p, %p): stub\n", This, cPropertyIDSets, rgPropertyIDSets,
           pcPropertySets, prgPropertySets);
@@ -218,7 +218,7 @@ HRESULT CALLBACK ISessionProperties_GetProperties_Proxy(ISessionProperties* This
 
 HRESULT __RPC_STUB ISessionProperties_GetProperties_Stub(ISessionProperties* This, ULONG cPropertyIDSets,
                                                          const DBPROPIDSET *rgPropertyIDSets, ULONG *pcPropertySets,
-                                                         const DBPROPSET **prgPropertySets, IErrorInfo **ppErrorInfoRem)
+                                                         DBPROPSET **prgPropertySets, IErrorInfo **ppErrorInfoRem)
 {
     FIXME("(%p, %d, %p, %p, %p, %p): stub\n", This, cPropertyIDSets, rgPropertyIDSets,
           pcPropertySets, prgPropertySets, ppErrorInfoRem);
diff --git a/include/sesprp.idl b/include/sesprp.idl
index 11e63912a17..b4aa727bad5 100644
--- a/include/sesprp.idl
+++ b/include/sesprp.idl
@@ -27,13 +27,13 @@ interface ISessionProperties : IUnknown
     HRESULT GetProperties([in] ULONG cPropertyIDSets,
                           [in, size_is(cPropertyIDSets)] const DBPROPIDSET rgPropertyIDSets[],
                           [in, out] ULONG *pcPropertySets,
-                          [out, size_is(,*pcPropertySets)] const DBPROPSET **prgPropertySets);
+                          [out, size_is(,*pcPropertySets)] DBPROPSET **prgPropertySets);
 
     [call_as(GetProperties)]
     HRESULT RemoteGetProperties([in] ULONG cPropertyIDSets,
                                 [in, unique, size_is(cPropertyIDSets)] const DBPROPIDSET *rgPropertyIDSets,
                                 [in, out] ULONG *pcPropertySets,
-                                [out, size_is(,*pcPropertySets)] const DBPROPSET **prgPropertySets,
+                                [out, size_is(,*pcPropertySets)] DBPROPSET **prgPropertySets,
                                 [out] IErrorInfo **ppErrorInfoRem);