diff --git a/src/kits/interface/qoca/QcOrigRowStateVector.ch b/src/kits/interface/qoca/QcOrigRowStateVector.ch
index d7e897f79c..daa84a64b4 100644
--- a/src/kits/interface/qoca/QcOrigRowStateVector.ch
+++ b/src/kits/interface/qoca/QcOrigRowStateVector.ch
@@ -158,7 +158,7 @@ virtualAssertLinkageInvar() const
     {
       QcOrigRowState const *state = CAST(QcOrigRowState const *, *i);
       assert( state->fRHS == 0.0);
-      assert( state->fMRowIndex == (void *)i - (void *)fStates);
+      assert( state->fMRowIndex == (char *)i - (char *)fStates);
       assert( !state->fARowDeleted);
     }
 }