diff --git a/src/qt/coincontroldialog.cpp b/src/qt/coincontroldialog.cpp
--- a/src/qt/coincontroldialog.cpp
+++ b/src/qt/coincontroldialog.cpp
@@ -464,8 +464,8 @@
         nPayAmount += amount;
 
         if (amount > Amount::zero()) {
-            CTxOut txout(amount,
-                         static_cast<CScript>(std::vector<uint8_t>(24, 0)));
+            // Assumes a p2pkh script size
+            CTxOut txout(amount, CScript() << std::vector<uint8_t>(24, 0));
             txDummy.vout.push_back(txout);
             fDust |= IsDust(txout, model->node().getDustRelayFee());
         }
@@ -551,8 +551,8 @@
             // Never create dust outputs; if we would, just add the dust to the
             // fee.
             if (nChange > Amount::zero() && nChange < MIN_CHANGE) {
-                CTxOut txout(nChange,
-                             static_cast<CScript>(std::vector<uint8_t>(24, 0)));
+                // Assumes a p2pkh script size
+                CTxOut txout(nChange, CScript() << std::vector<uint8_t>(24, 0));
                 if (IsDust(txout, model->node().getDustRelayFee())) {
                     nPayFee += nChange;
                     nChange = Amount::zero();
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -76,7 +76,7 @@
     // Drop the signature in scripts when SIGHASH_FORKID is not used.
     SigHashType sigHashType = GetHashType(vchSig);
     if (!(flags & SCRIPT_ENABLE_SIGHASH_FORKID) || !sigHashType.hasForkId()) {
-        FindAndDelete(scriptCode, CScript(vchSig));
+        FindAndDelete(scriptCode, CScript() << vchSig);
     }
 }
 
diff --git a/src/script/script.h b/src/script/script.h
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -472,7 +472,9 @@
 
     explicit CScript(opcodetype b) { operator<<(b); }
     explicit CScript(const CScriptNum &b) { operator<<(b); }
-    explicit CScript(const std::vector<uint8_t> &b) { operator<<(b); }
+    // delete non-existent constructor to defend against future introduction
+    // e.g. via prevector
+    explicit CScript(const std::vector<uint8_t> &b) = delete;
 
     CScript &operator<<(int64_t b) { return push_int64(b); }