diff --git a/src/qt/transactionview.cpp b/src/qt/transactionview.cpp
--- a/src/qt/transactionview.cpp
+++ b/src/qt/transactionview.cpp
@@ -114,7 +114,11 @@
     } else {
         amountWidget->setFixedWidth(100);
     }
-    amountWidget->setValidator(new QDoubleValidator(0, 1e20, 8, this));
+    QDoubleValidator *amountValidator = new QDoubleValidator(0, 1e20, 8, this);
+    QLocale amountLocale(QLocale::C);
+    amountLocale.setNumberOptions(QLocale::RejectGroupSeparator);
+    amountValidator->setLocale(amountLocale);
+    amountWidget->setValidator(amountValidator);
     hlayout->addWidget(amountWidget);
 
     // Delay before filtering transactions in ms