diff --git a/src/app.cpp b/src/app.cpp
index 59037f1..f4f704a 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -5081,6 +5081,22 @@ void App::renderSeedMigrationDialog()
         {
             const bool canSweep = !state_.isLocked() && seed_migration_balance_ > 0.0;
             if (!canSweep) seed_migration_confirm_sweep_ = false;   // never keep a stale armed state
+            // The sweep (z_shieldcoinbase / z_mergetoaddress) needs an unlocked wallet, so an encrypted
+            // wallet silently disabled the button. Offer an inline unlock instead of a dead end.
+            if (state_.isLocked()) {
+                static char s_mig_unlock_pass[128] = {0};
+                ImGui::TextWrapped("%s", TR("mig_unlock_prompt"));
+                ImGui::SetNextItemWidth(220 * dp);
+                const bool submit = ImGui::InputText("##mig_unlock", s_mig_unlock_pass, sizeof(s_mig_unlock_pass),
+                                                     ImGuiInputTextFlags_Password | ImGuiInputTextFlags_EnterReturnsTrue);
+                ImGui::SameLine();
+                if ((ui::material::TactileButton(TR("mig_unlock_btn"), ImVec2(120 * dp, 0)) || submit)
+                    && s_mig_unlock_pass[0]) {
+                    unlockWallet(s_mig_unlock_pass, 600);
+                    sodium_memzero(s_mig_unlock_pass, sizeof(s_mig_unlock_pass));   // don't retain the secret
+                }
+                ImGui::Spacing();
+            }
             if (!seed_migration_confirm_sweep_) {
                 if (!canSweep) ImGui::BeginDisabled();
                 if (ui::material::TactileButton(TR("mig_sweep_all"), ImVec2(170 * dp, 0)))
diff --git a/src/util/i18n.cpp b/src/util/i18n.cpp
index 1f4ceab..bf8d9a6 100644
--- a/src/util/i18n.cpp
+++ b/src/util/i18n.cpp
@@ -512,6 +512,8 @@ void I18n::loadBuiltinEnglish()
         strings_["mig_to"] = "To: ";
         strings_["mig_unlock_first"] = "Unlock your wallet first to spend from it.";
         strings_["mig_sweep_all"] = "Sweep all funds";
+        strings_["mig_unlock_prompt"] = "Your wallet is locked. Enter your passphrase to unlock it, then sweep.";
+        strings_["mig_unlock_btn"] = "Unlock";
         strings_["mig_later"] = "Later";
         strings_["mig_sweeping"] = "Sweeping your funds into the new wallet…";
         strings_["mig_confirming"] = "Waiting for the sweep to confirm on-chain before switching wallets — this guarantees your funds have actually moved.";