diff --git a/src/gui/timespinbox.cpp b/src/gui/timespinbox.cpp
index be5f0014a..addea9ee3 100644
--- a/src/gui/timespinbox.cpp
+++ b/src/gui/timespinbox.cpp
@@ -17,6 +17,8 @@
 
 #include "gui/timespinbox.h"
 
+#include <QStringList>
+
 
 TimeSpinBox::TimeSpinBox(QWidget *parent) : QDoubleSpinBox(parent) {
   setMinimum(5.0);
@@ -36,7 +38,26 @@ double TimeSpinBox::valueFromText(const QString &text) const {
     return value;
   }
   else {
-    return 0.0;
+    QRegExp rx("\\b[0-9]{1,}\\b");
+    QStringList numbers;
+    int pos = 0;
+    int count = 0;
+
+    while ((pos = rx.indexIn(text, pos)) != -1) {
+      numbers.append(rx.cap(0));
+
+      if (pos >= 0) {
+        ++pos;
+        ++count;
+      }
+    }
+
+    if (numbers.size() == 2) {
+      return (numbers.at(0).toDouble() * 60.0) + numbers.at(1).toDouble();
+    }
+    else {
+      return -1.0;
+    }
   }
 }
 
@@ -59,3 +80,7 @@ void TimeSpinBox::fixup(QString &input) const {
     input = textFromValue(value);
   }
 }
+
+QValidator::State TimeSpinBox::validate(QString &input, int &pos) const {
+  return (valueFromText(input) != -1.0) ? QValidator::Acceptable : QValidator::Intermediate;
+}
diff --git a/src/gui/timespinbox.h b/src/gui/timespinbox.h
index 74c7f1ebd..7c848c487 100644
--- a/src/gui/timespinbox.h
+++ b/src/gui/timespinbox.h
@@ -29,6 +29,7 @@ class TimeSpinBox : public QDoubleSpinBox {
     double valueFromText(const QString &text) const;
     QString textFromValue(double val) const;
     void fixup(QString &input) const;
+    QValidator::State validate(QString &input, int &pos) const;
 };
 
 #endif // TIMESPINBOX_H