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-rw-r--r--src/opt/dau/dauNpn.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/opt/dau/dauNpn.c b/src/opt/dau/dauNpn.c
index 6d9f6435..f5e7cb67 100644
--- a/src/opt/dau/dauNpn.c
+++ b/src/opt/dau/dauNpn.c
@@ -158,7 +158,7 @@ void Dau_AddFunction( word tCur, int nVars, unsigned * pTable, Vec_Int_t * vNpns
unsigned tRep = pTable[t];
unsigned tRep2 = pTable[tRep & tMask];
assert( ((tNorm >> Digit) & 1) == 0 );
- assert( (tRep & tMask) == (tRep2 & tMask) );
+ assert( (tRep & (tMask>>1)) == (tRep2 & (tMask>>1)) );
if ( (tRep2 >> 31) == 0 ) // first time
{
Vec_IntPush( vNpns, tRep2 );