diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -836,7 +836,7 @@
     // Acquire current block source
     enum BlockSource blockSource = clientModel->getBlockSource();
     switch (blockSource) {
-        case BLOCK_SOURCE_NETWORK:
+        case BlockSource::NETWORK:
             if (header) {
                 updateHeadersSyncProgressLabel();
                 return;
@@ -844,17 +844,17 @@
             progressBarLabel->setText(tr("Synchronizing with network..."));
             updateHeadersSyncProgressLabel();
             break;
-        case BLOCK_SOURCE_DISK:
+        case BlockSource::DISK:
             if (header) {
                 progressBarLabel->setText(tr("Indexing blocks on disk..."));
             } else {
                 progressBarLabel->setText(tr("Processing blocks on disk..."));
             }
             break;
-        case BLOCK_SOURCE_REINDEX:
+        case BlockSource::REINDEX:
             progressBarLabel->setText(tr("Reindexing blocks on disk..."));
             break;
-        case BLOCK_SOURCE_NONE:
+        case BlockSource::NONE:
             if (header) {
                 return;
             }
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -23,12 +23,7 @@
 class QTimer;
 QT_END_NAMESPACE
 
-enum BlockSource {
-    BLOCK_SOURCE_NONE,
-    BLOCK_SOURCE_REINDEX,
-    BLOCK_SOURCE_DISK,
-    BLOCK_SOURCE_NETWORK
-};
+enum class BlockSource { NONE, REINDEX, DISK, NETWORK };
 
 enum NumConnections {
     CONNECTIONS_NONE = 0,
diff --git a/src/qt/clientmodel.cpp b/src/qt/clientmodel.cpp
--- a/src/qt/clientmodel.cpp
+++ b/src/qt/clientmodel.cpp
@@ -153,13 +153,13 @@
 
 enum BlockSource ClientModel::getBlockSource() const {
     if (fReindex)
-        return BLOCK_SOURCE_REINDEX;
+        return BlockSource::REINDEX;
     else if (fImporting)
-        return BLOCK_SOURCE_DISK;
+        return BlockSource::DISK;
     else if (getNumConnections() > 0)
-        return BLOCK_SOURCE_NETWORK;
+        return BlockSource::NETWORK;
 
-    return BLOCK_SOURCE_NONE;
+    return BlockSource::NONE;
 }
 
 void ClientModel::setNetworkActive(bool active) {