diff --git a/idl/inc/hash.hxx b/idl/inc/hash.hxx
index 6bc904133f61..86b2af448133 100644
--- a/idl/inc/hash.hxx
+++ b/idl/inc/hash.hxx
@@ -29,7 +29,7 @@
 class SvStringHashEntry
 {
     OString     aName;
-    sal_uLong   nValue;
+    sal_uInt32   nValue;
 public:
     SvStringHashEntry( OString aName_ )
         : aName(std::move(aName_))
@@ -39,8 +39,8 @@ public:
 
     const OString&  GetName() const { return aName; }
 
-    void            SetValue( sal_uLong n ) { nValue = n; }
-    sal_uLong       GetValue() const { return nValue; }
+    void            SetValue( sal_uInt32 n ) { nValue = n; }
+    sal_uInt32       GetValue() const { return nValue; }
 };
 
 class SvStringHashTable
diff --git a/idl/inc/object.hxx b/idl/inc/object.hxx
index 8d16ca563c74..b5c30c9e0247 100644
--- a/idl/inc/object.hxx
+++ b/idl/inc/object.hxx
@@ -71,7 +71,7 @@ private:
                                     SvIdlDataBase & rBase,
                                     SvStream & rOutStm );
 
-    void                    InsertSlots( SvSlotElementList& rList, std::vector<sal_uLong>& rSuperList,
+    void                    InsertSlots( SvSlotElementList& rList, std::vector<sal_uInt32>& rSuperList,
                                     SvMetaClassList & rClassList,
                                     const OString& rPrefix, SvIdlDataBase& rBase );
 
diff --git a/idl/inc/slot.hxx b/idl/inc/slot.hxx
index f8ba61d98fa3..fd8e9c0ad5ce 100644
--- a/idl/inc/slot.hxx
+++ b/idl/inc/slot.hxx
@@ -48,7 +48,7 @@ public:
     SvBOOL           aContainer;
     OString          aDisableFlags;
     SvMetaSlot*      pNextSlot;
-    sal_uLong        nListPos;
+    sal_uInt32       nListPos;
     SvBOOL           aReadOnlyDoc;
 
     void            WriteSlot( std::string_view rShellName,
@@ -104,9 +104,9 @@ public:
     bool                GetContainer() const;
     bool                GetReadOnlyDoc() const;
 
-    sal_uLong           GetListPos() const
+    sal_uInt32           GetListPos() const
                         { return nListPos; }
-    void                SetListPos(sal_uLong n)
+    void                SetListPos(sal_uInt32 n)
                         { nListPos = n; }
     void                ResetSlotPointer()
                         { pNextSlot = nullptr; }
diff --git a/idl/source/objects/object.cxx b/idl/source/objects/object.cxx
index 510d3a8a791d..8c3cfb7b28ba 100644
--- a/idl/source/objects/object.cxx
+++ b/idl/source/objects/object.cxx
@@ -165,7 +165,7 @@ sal_uInt16 SvMetaClass::WriteSlots( std::string_view rShellName,
     return nSCount;
 }
 
-void SvMetaClass::InsertSlots( SvSlotElementList& rList, std::vector<sal_uLong>& rSuperList,
+void SvMetaClass::InsertSlots( SvSlotElementList& rList, std::vector<sal_uInt32>& rSuperList,
                             SvMetaClassList &rClassList,
                             const OString& rPrefix, SvIdlDataBase& rBase)
 {
@@ -177,14 +177,14 @@ void SvMetaClass::InsertSlots( SvSlotElementList& rList, std::vector<sal_uLong>&
     rClassList.push_back( this );
 
     // write all direct attributes
-    sal_uLong n;
+    size_t n;
     for( n = 0; n < aAttrList.size(); n++ )
     {
         SvMetaAttribute * pAttr = aAttrList[n];
 
-        sal_uLong nId = pAttr->GetSlotId().GetValue();
+        sal_uInt32 nId = pAttr->GetSlotId().GetValue();
 
-        std::vector<sal_uLong>::iterator iter = std::find(rSuperList.begin(),
+        std::vector<sal_uInt32>::iterator iter = std::find(rSuperList.begin(),
                                                       rSuperList.end(),nId);
 
         if( iter == rSuperList.end() )
@@ -282,7 +282,7 @@ void SvMetaClass::WriteSfx( SvIdlDataBase & rBase, SvStream & rOutStm )
     rOutStm.WriteCharPtr("static SfxFormalArgument a").WriteOString(GetName()).WriteCharPtr("Args_Impl[] =") << endl;
     rOutStm.WriteChar('{') << endl;
 
-    std::vector<sal_uLong> aSuperList;
+    std::vector<sal_uInt32> aSuperList;
     SvMetaClassList classList;
     SvSlotElementList aSlotList;
     InsertSlots(aSlotList, aSuperList, classList, OString(), rBase);
diff --git a/idl/source/objects/slot.cxx b/idl/source/objects/slot.cxx
index 17b8970edc8a..7ff190141d6d 100644
--- a/idl/source/objects/slot.cxx
+++ b/idl/source/objects/slot.cxx
@@ -541,7 +541,7 @@ void SvMetaSlot::WriteSlot( std::string_view rShellName, sal_uInt16 nCount,
         if( IsMethod() )
         {
             SvMetaType * pType = GetType();
-            sal_uLong nSCount = pType->GetAttrCount();
+            size_t nSCount = pType->GetAttrCount();
             rOutStm
                .WriteOString( OString::number(nSCount) )
                .WriteCharPtr( "/*Count*/," );
diff --git a/idl/source/prj/svidl.cxx b/idl/source/prj/svidl.cxx
index 2c9fbf63d770..a7593c349377 100644
--- a/idl/source/prj/svidl.cxx
+++ b/idl/source/prj/svidl.cxx
@@ -29,8 +29,8 @@
 static bool FileMove_Impl( const OUString & rFile1, const OUString & rFile2, bool bMoveAlways )
 {
     //printf( "Move from %s to %s\n", rFile2.GetStr(), rFile1.GetStr() );
-    sal_uLong nC1 = 0;
-    sal_uLong nC2 = 1;
+    size_t nC1 = 0;
+    size_t nC2 = 1;
     if( !bMoveAlways )
     {
         SvFileStream aOutStm1( rFile1, StreamMode::STD_READ );