diff --git a/base/base_tests/string_utils_test.cpp b/base/base_tests/string_utils_test.cpp
index 05c269d29c..4eccdbd0f1 100644
--- a/base/base_tests/string_utils_test.cpp
+++ b/base/base_tests/string_utils_test.cpp
@@ -625,3 +625,17 @@ UNIT_TEST(NormalizeDigits)
   TEST_EQUAL(nd("a０１9２ "), "a0192 ", ());
   TEST_EQUAL(nd("３４５６７８９"), "3456789", ());
 }
+
+UNIT_TEST(NormalizeDigits_UniString)
+{
+  auto const nd = [](string const & utf8) -> string
+  {
+    strings::UniString us = strings::MakeUniString(utf8);
+    strings::NormalizeDigits(us);
+    return strings::ToUtf8(us);
+  };
+  TEST_EQUAL(nd(""), "", ());
+  TEST_EQUAL(nd("z12345／／"), "z12345／／", ());
+  TEST_EQUAL(nd("a０１9２ "), "a0192 ", ());
+  TEST_EQUAL(nd("３４５６７８９"), "3456789", ());
+}
diff --git a/base/string_utils.cpp b/base/string_utils.cpp
index 857c190c9b..af21d91290 100644
--- a/base/string_utils.cpp
+++ b/base/string_utils.cpp
@@ -113,7 +113,8 @@ UniString Normalize(UniString const & s)
   return result;
 }
 
-void NormalizeDigits(string &utf8) {
+void NormalizeDigits(string & utf8)
+{
   size_t const n = utf8.size();
   size_t const m = n >= 2 ? n - 2 : 0;
 
@@ -151,6 +152,17 @@ void NormalizeDigits(string &utf8) {
   utf8.resize(j);
 }
 
+void NormalizeDigits(UniString & us)
+{
+  size_t const size = us.size();
+  for (size_t i = 0; i < size; ++i)
+  {
+    UniChar const c = us[i];
+    if (c >= 0xFF10 /* '０' */ && c <= 0xFF19 /* '９' */)
+      us[i] = c - 0xFF10 + '0';
+  }
+}
+
 namespace
 {
   char ascii_to_lower(char in)
diff --git a/base/string_utils.hpp b/base/string_utils.hpp
index a7a6a4290d..1c4634646a 100644
--- a/base/string_utils.hpp
+++ b/base/string_utils.hpp
@@ -45,6 +45,7 @@ UniString Normalize(UniString const & s);
 
 /// Replaces "full width" unicode digits with ascii ones.
 void NormalizeDigits(string & utf8);
+void NormalizeDigits(UniString & us);
 
 /// Counts number of start symbols in string s (that is not lower and not normalized) that maches
 /// to lower and normalized string low_s. If s doen't starts with low_s then returns 0; otherwise