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-rw-r--r--src/opt/dec/decFactor.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/opt/dec/decFactor.c b/src/opt/dec/decFactor.c
index dca422ea..768dcd9b 100644
--- a/src/opt/dec/decFactor.c
+++ b/src/opt/dec/decFactor.c
@@ -364,6 +364,7 @@ Mvc_Cover_t * Dec_ConvertSopToMvc( char * pSop )
***********************************************************************/
int Dec_FactorVerify( char * pSop, Dec_Graph_t * pFForm )
{
+ extern DdNode * Dec_GraphDeriveBdd( DdManager * dd, Dec_Graph_t * pGraph );
DdManager * dd = Abc_FrameReadManDd();
DdNode * bFunc1, * bFunc2;
int RetValue;