diff --git a/lib/gui_qt.py b/lib/gui_qt.py
index 3116c0a8..dea7e1d0 100644
--- a/lib/gui_qt.py
+++ b/lib/gui_qt.py
@@ -600,7 +600,7 @@ class ElectrumWindow(QMainWindow):
             item.setFont(3, QFont(MONOSPACE_FONT))
             item.setFont(4, QFont(MONOSPACE_FONT))
             if value < 0:
-				item.setForeground(3, QBrush(QColor("#BC1E1E")))
+                item.setForeground(3, QBrush(QColor("#BC1E1E")))
             if tx_hash:
                 item.setToolTip(0, tx_hash)
             if is_default_label:
diff --git a/lib/history_widget.py b/lib/history_widget.py
index 2ca9a5dd..3a6caf96 100644
--- a/lib/history_widget.py
+++ b/lib/history_widget.py
@@ -21,6 +21,6 @@ class HistoryWidget(QTreeWidget):
           date = "Unknown"
         item = QTreeWidgetItem([amount, address, date])
         if float(amount) < 0:
-		  item.setForeground(0, QBrush(QColor("#BC1E1E")))
+          item.setForeground(0, QBrush(QColor("#BC1E1E")))
         self.insertTopLevelItem(0, item)