diff --git a/ui/widgets/input_fields.cpp b/ui/widgets/input_fields.cpp
index db17e0c..ded3b52 100644
--- a/ui/widgets/input_fields.cpp
+++ b/ui/widgets/input_fields.cpp
@@ -23,6 +23,7 @@
 #include <QtGui/QTextDocumentFragment>
 #include <QtCore/QMimeData>
 #include <QtCore/QRegularExpression>
+#include <QtCore/QMap>
 
 namespace Ui {
 namespace {
@@ -48,6 +49,8 @@ const auto kNewlineChars = QString("\r\n")
 	+ QChar(QChar::ParagraphSeparator)
 	+ QChar(QChar::LineSeparator);
 
+QMap<QString, QString> customReplacesMap;
+
 class InputDocument : public QTextDocument {
 public:
 	InputDocument(QObject *parent, const style::InputField &st);
@@ -809,6 +812,10 @@ struct FormattingAction {
 
 } // namespace
 
+void AddCustomReplacement(QString from, QString to) {
+	customReplacesMap.insert(from, to);
+}
+
 // kTagUnderline is not used for Markdown.
 
 const QString InputField::kTagBold = QStringLiteral("**");
@@ -903,6 +910,9 @@ const InstantReplaces &InstantReplaces::Default() {
 			Assert(emoji != nullptr);
 			result.add(what, emoji->text());
 		}
+		for (auto i = customReplacesMap.constBegin(), e = customReplacesMap.constEnd(); i != e; ++i) {
+			result.add(i.key(), i.value());
+		}
 		return result;
 	}();
 	return result;
@@ -917,6 +927,9 @@ const InstantReplaces &InstantReplaces::TextOnly() {
 		result.add(
 			":shrug:",
 			QChar(175) + QString("\\_(") + QChar(12484) + ")_/" + QChar(175));
+		for (auto i = customReplacesMap.constBegin(), e = customReplacesMap.constEnd(); i != e; ++i) {
+			result.add(i.key(), i.value());
+		}
 		return result;
 	}();
 	return result;
diff --git a/ui/widgets/input_fields.h b/ui/widgets/input_fields.h
index 2873ea7..3e2fbd3 100644
--- a/ui/widgets/input_fields.h
+++ b/ui/widgets/input_fields.h
@@ -22,6 +22,8 @@ class Painter;
 
 namespace Ui {
 
+void AddCustomReplacement(QString from, QString to);
+
 const auto kClearFormatSequence = QKeySequence("ctrl+shift+n");
 const auto kStrikeOutSequence = QKeySequence("ctrl+shift+x");
 const auto kMonospaceSequence = QKeySequence("ctrl+shift+m");