diff --git a/src/qt/optionsdialog.cpp b/src/qt/optionsdialog.cpp
--- a/src/qt/optionsdialog.cpp
+++ b/src/qt/optionsdialog.cpp
@@ -167,8 +167,7 @@
                     (MIN_DISK_SPACE_FOR_BLOCK_FILES % GB_BYTES)
                 ? 1
                 : 0;
-        ui->pruneSize->setRange(nMinDiskSpace,
-                                _model->node().getAssumedBlockchainSize());
+        ui->pruneSize->setRange(nMinDiskSpace, std::numeric_limits<int>::max());
 
         QString strLabel = _model->getOverriddenByCommandLine();
         if (strLabel.isEmpty()) {