diff --git a/src/spicelib/devices/vsrc/vsrcpar.c b/src/spicelib/devices/vsrc/vsrcpar.c
index 1c58e35f2..b9c6847be 100644
--- a/src/spicelib/devices/vsrc/vsrcpar.c
+++ b/src/spicelib/devices/vsrc/vsrcpar.c
@@ -297,7 +297,7 @@ VSRCparam(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
         case VSRC_SOUND: {
             here->VSRCfunctionType = SOUND;
             here->VSRCfuncTGiven = TRUE;
-            here->VSRCcoeffs = value->v.vec.rVec;
+            copy_coeffs(here, value);
             here->VSRCcoeffsGiven = TRUE;
             vsjack_open(-1); // initialize
             if (jfile) {