diff --git a/beets/dbcore/types.py b/beets/dbcore/types.py
index 935d03870..bc923f747 100644
--- a/beets/dbcore/types.py
+++ b/beets/dbcore/types.py
@@ -183,6 +183,17 @@ class Float(Type):
         return u'{0:.1f}'.format(value or 0.0)
 
 
+class PaddedFloat(Integer):
+    """A float field that is formatted with a given number of digits,
+    padded with zeroes.
+    """
+    def __init__(self, digits):
+        self.digits = digits
+
+    def format(self, value):
+        return u'{0:0{1}d}'.format(value or 0, self.digits)
+
+
 class NullFloat(Float):
     """Same as `Float`, but does not normalize `None` to `0.0`.
     """
diff --git a/beetsplug/acousticbrainz.py b/beetsplug/acousticbrainz.py
index 3a6db7d4e..9c1eb7ce5 100644
--- a/beetsplug/acousticbrainz.py
+++ b/beetsplug/acousticbrainz.py
@@ -117,13 +117,13 @@ class AcousticPlugin(plugins.BeetsPlugin):
         'genre_rosamerica': types.STRING,
         'initial_key': types.STRING,
         'key_strength': types.FLOAT,
-        'mood_acoustic': types.FLOAT,
-        'mood_aggressive': types.FLOAT,
-        'mood_electronic': types.FLOAT,
-        'mood_happy': types.FLOAT,
-        'mood_party': types.FLOAT,
-        'mood_relaxed': types.FLOAT,
-        'mood_sad': types.FLOAT,
+        'mood_acoustic': types.PaddedInt(6),
+        'mood_aggressive': types.PaddedInt(6),
+        'mood_electronic': types.PaddedInt(6),
+        'mood_happy': types.PaddedInt(6),
+        'mood_party': types.PaddedInt(6),
+        'mood_relaxed': types.PaddedInt(6),
+        'mood_sad': types.PaddedInt(6),
         'rhythm': types.FLOAT,
         'tonal': types.FLOAT,
         'voice_instrumental': types.STRING,