diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index 81a5f4478..688ea3e96 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -21845,7 +21845,7 @@ int Abc_CommandIf( Abc_Frame_t * pAbc, int argc, char ** argv )
             Abc_Print( -1, "This feature only works for {6,7}-LUTs.\n" );
             return 1;
         }
-        pPars->pFuncCell = If_CutPerformCheck07;
+        pPars->pFuncCell = If_CutPerformCheckJ;
         pPars->fCutMin = 1;
     }
     if ( pPars->fUseCofVars )
@@ -43180,12 +43180,12 @@ int Abc_CommandAbc9If( Abc_Frame_t * pAbc, int argc, char ** argv )
             //pPars->fUseCofVars ^= 1;
             pPars->fUseCheck2 ^= 1;
             break;
-//        case 'j':
-//            pPars->fEnableCheck07 ^= 1;
-//            break;
         case 'j':
-            pPars->fUseAndVars ^= 1;
+            pPars->fEnableCheck07 ^= 1;
             break;
+        //case 'j':
+        //    pPars->fUseAndVars ^= 1;
+        //    break;
         case 'k':
             pPars->fUseDsdTune ^= 1;
             break;
@@ -43288,7 +43288,7 @@ int Abc_CommandAbc9If( Abc_Frame_t * pAbc, int argc, char ** argv )
             Abc_Print( -1, "This feature only works for {6,7}-LUTs.\n" );
             return 1;
         }
-        pPars->pFuncCell = If_CutPerformCheck07;
+        pPars->pFuncCell = If_CutPerformCheckJ;
         pPars->fCutMin = 1;
     }
     if ( pPars->fUseCheck1 || pPars->fUseCheck2 )
@@ -43569,7 +43569,7 @@ usage:
     Abc_Print( -2, "\t-f       : toggles enabling additional check [default = %s]\n", pPars->fEnableCheck75? "yes": "no" );
     Abc_Print( -2, "\t-u       : toggles enabling additional check [default = %s]\n", pPars->fEnableCheck75u? "yes": "no" );
     Abc_Print( -2, "\t-i       : toggles using cofactoring variables [default = %s]\n", pPars->fUseCofVars? "yes": "no" );
-//    Abc_Print( -2, "\t-j       : toggles enabling additional check [default = %s]\n", pPars->fEnableCheck07? "yes": "no" );
+    Abc_Print( -2, "\t-j       : toggles enabling additional check [default = %s]\n", pPars->fEnableCheck07? "yes": "no" );
     Abc_Print( -2, "\t-j       : toggles using AND bi-decomposition [default = %s]\n", pPars->fUseAndVars? "yes": "no" );
     Abc_Print( -2, "\t-k       : toggles matching based on precomputed DSD manager [default = %s]\n", pPars->fUseDsdTune? "yes": "no" );
     Abc_Print( -2, "\t-z       : toggles deriving LUTs when mapping into LUT structures [default = %s]\n", pPars->fDeriveLuts? "yes": "no" );
diff --git a/src/map/if/if.h b/src/map/if/if.h
index e638b80da..9056d1f1f 100644
--- a/src/map/if/if.h
+++ b/src/map/if/if.h
@@ -560,6 +560,7 @@ extern int             If_CutPerformCheckXX( If_Man_t * p, unsigned * pTruth, in
 extern int             If_CutPerformCheck45( If_Man_t * p, unsigned * pTruth, int nVars, int nLeaves, char * pStr );
 extern int             If_CutPerformCheck54( If_Man_t * p, unsigned * pTruth, int nVars, int nLeaves, char * pStr );
 extern int             If_CutPerformCheck75( If_Man_t * p, unsigned * pTruth, int nVars, int nLeaves, char * pStr );
+extern int             If_CutPerformCheckJ( If_Man_t * p, unsigned * pTruth, int nVars, int nLeaves, char * pStr );
 extern float           If_CutDelayLutStruct( If_Man_t * p, If_Cut_t * pCut, char * pStr, float WireDelay );
 // extern int             If_CutPerformAcd( If_Man_t * p, unsigned nVars, int lutSize, unsigned * pdelay, int use_late_arrival, unsigned * cost );
 extern int             If_CluCheckExt( void * p, word * pTruth, int nVars, int nLutLeaf, int nLutRoot, 
diff --git a/src/map/if/ifDecJ.c b/src/map/if/ifDecJ.c
new file mode 100644
index 000000000..d77640ee0
--- /dev/null
+++ b/src/map/if/ifDecJ.c
@@ -0,0 +1,60 @@
+/**CFile****************************************************************
+
+  FileName    [ifDec07.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [FPGA mapping based on priority cuts.]
+
+  Synopsis    [Performs additional check.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - November 21, 2006.]
+
+  Revision    [$Id: ifDec07.c,v 1.00 2006/11/21 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "if.h"
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Performs additional check.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int If_CutPerformCheckJ( If_Man_t * p, unsigned * pTruth, int nVars, int nLeaves, char * pStr )
+{
+    int v;
+    // skip non-support minimal
+    for ( v = 0; v < nLeaves; v++ )
+        if ( !Abc_TtHasVar( (word *)pTruth, nVars, v ) )
+            return 0;
+    return 1;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/map/if/module.make b/src/map/if/module.make
index bd652f35b..96c90cab8 100644
--- a/src/map/if/module.make
+++ b/src/map/if/module.make
@@ -9,6 +9,7 @@ SRC +=  src/map/if/ifCom.c \
     src/map/if/ifDec16.c \
     src/map/if/ifDec66.c \
     src/map/if/ifDec75.c \
+    src/map/if/ifDecJ.c \
     src/map/if/ifDelay.c \
     src/map/if/ifDsd.c \
     src/map/if/ifLibBox.c \