diff --git a/src/include/ngspice/smpdefs.h b/src/include/ngspice/smpdefs.h
index eda52847f..70766d3a5 100644
--- a/src/include/ngspice/smpdefs.h
+++ b/src/include/ngspice/smpdefs.h
@@ -38,7 +38,6 @@ int SMPcDProd(SMPmatrix *Matrix, SPcomplex *pMantissa, int *pExponent);
 SMPelement * SMPfindElt( SMPmatrix *, int , int , int );
 int SMPcZeroCol(SMPmatrix *Matrix, int Col);
 int SMPcAddCol(SMPmatrix *Matrix, int Accum_Col, int Addend_Col);
-int SMPzeroRow(SMPmatrix *Matrix, int Row);
 void SMPconstMult(SMPmatrix *, double);
 void SMPmultiply(SMPmatrix *, double *, double *, double *, double *);