diff --git a/app/src/main/java/org/solovyev/android/calculator/preferences/NumberFormatPreference.java b/app/src/main/java/org/solovyev/android/calculator/preferences/NumberFormatPreference.java
index 8a36d481..f921f8a6 100644
--- a/app/src/main/java/org/solovyev/android/calculator/preferences/NumberFormatPreference.java
+++ b/app/src/main/java/org/solovyev/android/calculator/preferences/NumberFormatPreference.java
@@ -63,9 +63,8 @@ public class NumberFormatPreference extends DialogPreference {
         ButterKnife.bind(this, view);
 
         final SharedPreferences preferences = getSharedPreferences();
-        final int maxPrecision = precisionSeekBar.getMaxTick();
-        precisionSeekBar.setMax(maxPrecision);
-        precisionSeekBar.setCurrentTick(Math.max(0, Math.min(maxPrecision, Output.precision.getPreference(preferences))));
+        precisionSeekBar.setMax(NumberFormatter.MAX_PRECISION);
+        precisionSeekBar.setCurrentTick(Math.max(0, Math.min(NumberFormatter.MAX_PRECISION, Output.precision.getPreference(preferences))));
         notationAdapter = makeNotationAdapter();
         notationSpinner.setAdapter(notationAdapter);
         notationSpinner.setSelection(indexOf(notationAdapter, Output.notation.getPreference(preferences)));
diff --git a/jscl/src/main/java/org/solovyev/common/NumberFormatter.java b/jscl/src/main/java/org/solovyev/common/NumberFormatter.java
index 8c824e98..e5fa934a 100644
--- a/jscl/src/main/java/org/solovyev/common/NumberFormatter.java
+++ b/jscl/src/main/java/org/solovyev/common/NumberFormatter.java
@@ -18,7 +18,7 @@ public class NumberFormatter {
     public static final char NO_GROUPING = 0;
     public static final int NO_ROUNDING = -1;
     public static final int DEFAULT_MAGNITUDE = 5;
-    public static final int MAX_PRECISION = 16;
+    public static final int MAX_PRECISION = 15;
 
     private final Real.NumberFormat numberFormat = new Real.NumberFormat();
     private final Real real = new Real();