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-rw-r--r--src/base/abc/abcNtk.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/base/abc/abcNtk.c b/src/base/abc/abcNtk.c
index a574bf82..687d130f 100644
--- a/src/base/abc/abcNtk.c
+++ b/src/base/abc/abcNtk.c
@@ -1771,7 +1771,7 @@ void Abc_NtkDropOneOutput( Abc_Ntk_t * pNtk, int iOutput, int fSkipSweep, int fU
pObj = Abc_NtkPo( pNtk, iOutput );
if ( Abc_ObjFanin0(pObj) == Abc_AigConst1(pNtk) )
{
- if ( !Abc_ObjFaninC0(pObj) )
+ if ( !Abc_ObjFaninC0(pObj) ^ fUseConst1 )
Abc_ObjXorFaninC( pObj, 0 );
return;
}