diff --git a/base/base.pro b/base/base.pro
index 68df155c41..b08a697600 100644
--- a/base/base.pro
+++ b/base/base.pro
@@ -83,4 +83,5 @@ HEADERS += \
     threaded_priority_queue.hpp \
     timegm.hpp \
     timer.hpp \
+    visual_scale.hpp \
     worker_thread.hpp \
diff --git a/base/visual_scale.hpp b/base/visual_scale.hpp
new file mode 100644
index 0000000000..9b8fe1944d
--- /dev/null
+++ b/base/visual_scale.hpp
@@ -0,0 +1,11 @@
+#pragma once
+
+inline double VisualScale(double exactDensityDPI)
+{
+  double const mdpiDensityDPI = 160.;
+  // For some old devices (for example iPad 2) the density could be less than 160 DPI.
+  // Returns one in that case to keep readable text on the map.
+  if (exactDensityDPI <= mdpiDensityDPI)
+    return 1.;
+  return exactDensityDPI / mdpiDensityDPI;
+}