diff --git a/res/values/strings.xml b/res/values/strings.xml
index b41fdc5..ca31dca 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -12,7 +12,7 @@
   <string name="pref_accents_e_none">Hide accents</string>
   <string name="pref_category_typing">Typing</string>
   <string name="pref_preci_title">Precision</string>
-  <string name="pref_preci_summary">Distance of corner values (%spx)</string>
+  <string name="pref_preci_summary">Distance of corner values (%sdp)</string>
   <string name="pref_long_timeout_title">Long press timeout</string>
   <string name="pref_long_interval_title">Long press interval</string>
   <string name="pref_category_vibrate">Vibration</string>
diff --git a/srcs/juloo.keyboard2/Config.java b/srcs/juloo.keyboard2/Config.java
index 254f57c..7123043 100644
--- a/srcs/juloo.keyboard2/Config.java
+++ b/srcs/juloo.keyboard2/Config.java
@@ -73,21 +73,21 @@ final class Config
     SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
     DisplayMetrics dm = context.getResources().getDisplayMetrics();
     layout = layoutId_of_string(prefs.getString("layout", "system")); 
-    subValueDist = prefs.getFloat("sub_value_dist", subValueDist);
+    subValueDist = getDipPrefFloat(dm, prefs, "sub_value_dist", subValueDist);
     vibrateEnabled = prefs.getBoolean("vibrate_enabled", vibrateEnabled);
     vibrateDuration = prefs.getInt("vibrate_duration", (int)vibrateDuration);
     longPressTimeout = prefs.getInt("longpress_timeout", (int)longPressTimeout);
     longPressInterval = prefs.getInt("longpress_interval", (int)longPressInterval);
-    marginBottom = getDipPref(dm, prefs, "margin_bottom", marginBottom);
-    keyHeight = getDipPref(dm, prefs, "key_height", keyHeight);
-    horizontalMargin = getDipPref(dm, prefs, "horizontal_margin", horizontalMargin);
+    marginBottom = getDipPrefInt(dm, prefs, "margin_bottom", marginBottom);
+    keyHeight = getDipPrefInt(dm, prefs, "key_height", keyHeight);
+    horizontalMargin = getDipPrefInt(dm, prefs, "horizontal_margin", horizontalMargin);
     preciseRepeat = prefs.getBoolean("precise_repeat", preciseRepeat);
     characterSize = prefs.getFloat("character_size", characterSize); 
     accents = Integer.valueOf(prefs.getString("accents", "1"));
     theme = themeId_of_string(prefs.getString("theme", ""));
   }
 
-  private float getDipPref(DisplayMetrics dm, SharedPreferences prefs, String pref_name, float def)
+  private float getDipPrefInt(DisplayMetrics dm, SharedPreferences prefs, String pref_name, float def)
   {
     int value = prefs.getInt(pref_name, -1);
     if (value < 0)
@@ -95,6 +95,14 @@ final class Config
     return (TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, value, dm));
   }
 
+  private float getDipPrefFloat(DisplayMetrics dm, SharedPreferences prefs, String pref_name, float def)
+  {
+    float value = prefs.getFloat(pref_name, -1.f);
+    if (value < 0.f)
+      return (def);
+    return (TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, value, dm));
+  }
+
   public static int layoutId_of_string(String name)
   {
     switch (name)