diff --git a/src/aig/gia/giaIf.c b/src/aig/gia/giaIf.c
index 8b29e79c0..1ffca1789 100644
--- a/src/aig/gia/giaIf.c
+++ b/src/aig/gia/giaIf.c
@@ -2310,6 +2310,8 @@ void Gia_ManTransferPacking( Gia_Man_t * p, Gia_Man_t * pGia )
 }
 void Gia_ManTransferTiming( Gia_Man_t * p, Gia_Man_t * pGia )
 {
+    if ( p == pGia )
+        return;
     if ( pGia->vCiArrs || pGia->vCoReqs || pGia->vCoArrs || pGia->vCoAttrs )
     {
         p->vCiArrs     = pGia->vCiArrs;     pGia->vCiArrs    = NULL;
@@ -2337,7 +2339,7 @@ void Gia_ManTransferTiming( Gia_Man_t * p, Gia_Man_t * pGia )
         p->vConfigs     = pGia->vConfigs;     pGia->vConfigs     = NULL;
         p->pCellStr     = pGia->pCellStr;     pGia->pCellStr     = NULL;
     }
-    if ( pGia->pManTime == NULL || p == pGia )
+    if ( pGia->pManTime == NULL )
         return;
     p->pManTime    = pGia->pManTime;    pGia->pManTime    = NULL;
     p->pAigExtra   = pGia->pAigExtra;   pGia->pAigExtra   = NULL;