diff --git a/src/base/io/io.c b/src/base/io/io.c
index 97d30c1b8..364d82d0b 100644
--- a/src/base/io/io.c
+++ b/src/base/io/io.c
@@ -3416,18 +3416,23 @@ int IoCommandWriteHMetis( Abc_Frame_t * pAbc, int argc, char **argv )
     char * pFileName;
     int fVerbose;
     int fSkipPo;
+    int fWeightEdges;
     int c;
 
     fSkipPo       = 1;
+    fWeightEdges  = 0;
     fVerbose      = 0;
     Extra_UtilGetoptReset();
-    while ( ( c = Extra_UtilGetopt( argc, argv, "svh" ) ) != EOF )
+    while ( ( c = Extra_UtilGetopt( argc, argv, "swvh" ) ) != EOF )
     {
         switch ( c )
         {
             case 's':
                 fSkipPo ^= 1;
                 break;
+            case 'w':
+                fWeightEdges ^= 1;
+                break;
             case 'v':
                 fVerbose ^= 1;
                 break;
@@ -3452,14 +3457,14 @@ int IoCommandWriteHMetis( Abc_Frame_t * pAbc, int argc, char **argv )
         fprintf( stdout, "Writing this format is only possible for structurally hashed AIGs.\n" );
         return 1;
     }
-    //Io_WriteAiger( pAbc->pNtkCur, pFileName, fWriteSymbols, fCompact, fUnique );
-    Io_WriteHMetis( pAbc->pNtkCur, pFileName, fSkipPo, fVerbose );
+    Io_WriteHMetis( pAbc->pNtkCur, pFileName, fSkipPo, fWeightEdges, fVerbose );
     return 0;
 
 usage:
     fprintf( pAbc->Err, "usage: write_hmetis <file>\n" );
     fprintf( pAbc->Err, "\t         writes the network in the hMetis format (https://karypis.github.io/glaros/files/sw/hmetis/manual.pdf)\n" );
     fprintf( pAbc->Err, "\t-s     : skip PO as sink explictly [default = %s]\n", fSkipPo? "yes" : "no" );
+    fprintf( pAbc->Err, "\t-w     : simulate weight on hyperedges [default = %s]\n", fWeightEdges? "yes" : "no" );
     fprintf( pAbc->Err, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes" : "no" );
     fprintf( pAbc->Err, "\t-h     : print the help massage\n" );
     fprintf( pAbc->Err, "\tfile   : the name of the file to write\n" );
diff --git a/src/base/io/ioAbc.h b/src/base/io/ioAbc.h
index 0f3034882..77c7dc292 100644
--- a/src/base/io/ioAbc.h
+++ b/src/base/io/ioAbc.h
@@ -131,7 +131,7 @@ extern void               Io_WriteEdgelist( Abc_Ntk_t * pNtk, char * pFileName,
 /*=== abcWriteGml.c ===========================================================*/
 extern void               Io_WriteGml( Abc_Ntk_t * pNtk, char * pFileName );
 /*=== abcWriteHMetis.c ===========================================================*/
-extern void               Io_WriteHMetis( Abc_Ntk_t * pNtk, char * pFileName, int fSkipPo, int fVerbose );
+extern void               Io_WriteHMetis( Abc_Ntk_t * pNtk, char * pFileName, int fSkipPo, int fWeightEdges, int fVerbose );
 /*=== abcWriteList.c ==========================================================*/
 extern void               Io_WriteList( Abc_Ntk_t * pNtk, char * pFileName, int fUseHost );
 /*=== abcWritePla.c ===========================================================*/
diff --git a/src/base/io/ioWriteHMetis.c b/src/base/io/ioWriteHMetis.c
index fa4d3d76d..5bb28783b 100644
--- a/src/base/io/ioWriteHMetis.c
+++ b/src/base/io/ioWriteHMetis.c
@@ -23,76 +23,89 @@ Minnesota(https://karypis.github.io/glaros/files/sw/hmetis/manual.pdf)]
 
 ABC_NAMESPACE_IMPL_START
 
-void Io_WriteHMetis( Abc_Ntk_t * pNtk, char * pFileName, int fSkipPo, int fVerbose )
+void Io_WriteHMetis( Abc_Ntk_t *pNtk, char *pFileName, int fSkipPo, int fWeightEdges, int fVerbose )
 {
-    Abc_Obj_t * pObj;
-    Abc_Obj_t * pFanout;
+    Abc_Obj_t *pObj;
+    Abc_Obj_t *pFanout;
     int i, j;
-    Vec_Int_t * vHyperEdgeEachWrite;
-    int Entry;
+    Vec_Int_t *vHyperEdgeEachWrite;
+    int iEntry;
+    int nHyperNodesNum = 0;
     // check that the network is valid
-    assert( Abc_NtkIsStrash( pNtk ) && Abc_NtkIsComb( pNtk ));
-    
-    FILE * pFHMetis = fopen( pFileName, "wb" );
-    Vec_Ptr_t * vHyperEdges = Vec_PtrAlloc(1000);
+    assert( Abc_NtkIsStrash( pNtk ) && Abc_NtkIsComb( pNtk ) );
+
+    FILE *pFHMetis = fopen( pFileName, "wb" );
+    Vec_Ptr_t *vHyperEdges = Vec_PtrAlloc( 1000 );
     if ( pFHMetis == NULL )
     {
         fprintf( stdout, "Io_WriteHMetis(): Cannot open the output file \"%s\".\n", pFileName );
-        ABC_FREE(pFHMetis);
+        ABC_FREE( pFHMetis );
         return;
     }
-    
-    //show pi/po/and number
+
+    // show pi/po/and number
     if ( fVerbose )
     {
-        Abc_Print( 1, "Writing hMetis file \"%s\" with %d nodes (%d pi, %d po, %d and nodes).\n", pFileName, Abc_NtkObjNum(pNtk), Abc_NtkPiNum(pNtk), Abc_NtkPoNum(pNtk), Abc_NtkNodeNum(pNtk) );
+        Abc_Print( 1, "Writing hMetis file \"%s\" with %d nodes (%d pi, %d po, %d and nodes).\n", pFileName, Abc_NtkObjNum( pNtk ), Abc_NtkPiNum( pNtk ), Abc_NtkPoNum( pNtk ), Abc_NtkNodeNum( pNtk ) );
     }
-    
+
     Abc_NtkForEachObj( pNtk, pObj, i )
     {
-        Vec_Int_t * vHyperEdgeEach = Vec_IntAlloc(20);
-        //push the node itself, which is a source node
-        Vec_IntPush(vHyperEdgeEach, Abc_ObjId(pObj));
-        //iterate through all the fanouts(sink) of the node
-        if( !Abc_ObjIsCo(pObj) )
+        Vec_Int_t *vHyperEdgeEach = Vec_IntAlloc( 20 );
+        // push the node itself, which is a source node
+        Vec_IntPush( vHyperEdgeEach, Abc_ObjId( pObj ) );
+        // iterate through all the fanouts(sink) of the node
+        if ( !Abc_ObjIsCo( pObj ) )
         {
-            Abc_ObjForEachFanout(pObj, pFanout, j)
+            Abc_ObjForEachFanout( pObj, pFanout, j )
             {
-                Vec_IntPush(vHyperEdgeEach, Abc_ObjId(pFanout));
+                Vec_IntPush( vHyperEdgeEach, Abc_ObjId( pFanout ) );
             }
-        }
-        else{
+        } else
+        {
             if ( fSkipPo )
             {
                 continue;
             }
-            Vec_IntPush(vHyperEdgeEach, Abc_ObjId(Abc_ObjFanin0(pObj)));
+            Vec_IntPush( vHyperEdgeEach, Abc_ObjId( Abc_ObjFanin0( pObj ) ) );
         }
-        Vec_PtrPush(vHyperEdges, vHyperEdgeEach); 
+        Vec_PtrPush( vHyperEdges, vHyperEdgeEach );
     }
     
-    //write the number of hyperedges and the number of vertices
-    fprintf(pFHMetis, "%d %d\n", Vec_PtrSize(vHyperEdges), Abc_NtkObjNum(pNtk));
-    //write the hyperedges
-    Vec_PtrForEachEntry(Vec_Int_t *, vHyperEdges, vHyperEdgeEachWrite, i)
+    nHyperNodesNum = fSkipPo ? Abc_NtkObjNum( pNtk ) - Abc_NtkPoNum( pNtk ) : Abc_NtkObjNum( pNtk );
+
+    // write the number of hyperedges and the number of vertices
+    if ( fWeightEdges )
     {
-        Vec_IntForEachEntry(vHyperEdgeEachWrite, Entry, j)
-        {   
-            if (j == Vec_IntSize(vHyperEdgeEachWrite) - 1)
-            {
-                fprintf(pFHMetis, "%d", Entry);
-            }
-            else
-            {
-                fprintf(pFHMetis, "%d ", Entry);     
-            }           
-        }
-        fprintf(pFHMetis, "\n");
+        fprintf( pFHMetis, "%d %d 1\n", Vec_PtrSize( vHyperEdges ), nHyperNodesNum );
+    } else
+    {
+        fprintf( pFHMetis, "%d %d\n", Vec_PtrSize( vHyperEdges ), nHyperNodesNum );
     }
-    //comments should be started with "%" in hMetis format
+    // write the hyperedges
+    Vec_PtrForEachEntry( Vec_Int_t *, vHyperEdges, vHyperEdgeEachWrite, i )
+    {
+        if ( fWeightEdges )
+        {
+            fprintf( pFHMetis, "%d ", Vec_IntSize( vHyperEdgeEachWrite ) );
+        }
+
+        Vec_IntForEachEntry( vHyperEdgeEachWrite, iEntry, j )
+        {
+            if ( j == Vec_IntSize( vHyperEdgeEachWrite ) - 1 )
+            {
+                fprintf( pFHMetis, "%d", iEntry );
+            } else
+            {
+                fprintf( pFHMetis, "%d ", iEntry );
+            }
+        }
+        fprintf( pFHMetis, "\n" );
+    }
+    // comments should be started with "%" in hMetis format
     fprintf( pFHMetis, "\n%%This file was written by ABC on %s\n", Extra_TimeStamp() );
     fprintf( pFHMetis, "%%For information about hMetis format, refer to %s\n", "https://karypis.github.io/glaros/files/sw/hmetis/manual.pdf" );
-    Vec_PtrFreeFree(vHyperEdges);
+    Vec_PtrFreeFree( vHyperEdges );
 }
 
 ABC_NAMESPACE_IMPL_END
\ No newline at end of file