diff --git a/src/java/com/threerings/stats/data/IntArrayStat.java b/src/java/com/threerings/stats/data/IntArrayStat.java
index 3560d2b0..0e680f2b 100644
--- a/src/java/com/threerings/stats/data/IntArrayStat.java
+++ b/src/java/com/threerings/stats/data/IntArrayStat.java
@@ -35,7 +35,7 @@ public class IntArrayStat extends Stat
     {
         if (!Arrays.equals(_value, value)) {
             _value = value;
-            _modified = true;
+            setModified(true);
             return true;
         }
         return false;
@@ -47,7 +47,7 @@ public class IntArrayStat extends Stat
     public void appendValue (int value)
     {
         _value = ArrayUtil.append(_value, value);
-        _modified = true;
+        setModified(true);
     }
     
     @Override // documentation inherited
diff --git a/src/java/com/threerings/stats/data/IntStat.java b/src/java/com/threerings/stats/data/IntStat.java
index dd06c90b..65f95feb 100644
--- a/src/java/com/threerings/stats/data/IntStat.java
+++ b/src/java/com/threerings/stats/data/IntStat.java
@@ -30,7 +30,7 @@ public class IntStat extends Stat
     {
         if (value != _value) {
             _value = value;
-            _modified = true;
+            setModified(true);
             return true;
         }
         return false;
diff --git a/src/java/com/threerings/stats/data/StringMapStat.java b/src/java/com/threerings/stats/data/StringMapStat.java
index b1930af2..b52a63a2 100644
--- a/src/java/com/threerings/stats/data/StringMapStat.java
+++ b/src/java/com/threerings/stats/data/StringMapStat.java
@@ -47,7 +47,7 @@ public abstract class StringMapStat extends Stat
         int ovalue = _values[iidx];
         _values[iidx] = Math.min(value, getMaxValue());
         if (_values[iidx] != ovalue) {
-            _modified = true;
+            setModified(true);
             return true;
         }
         return false;
@@ -67,7 +67,7 @@ public abstract class StringMapStat extends Stat
         int ovalue = _values[iidx];
         _values[iidx] = Math.min(_values[iidx] + amount, getMaxValue());
         if (_values[iidx] != ovalue) {
-            _modified = true;
+            setModified(true);
             return true;
         }
         return false;
diff --git a/src/java/com/threerings/stats/data/StringSetStat.java b/src/java/com/threerings/stats/data/StringSetStat.java
index 8fb259f4..d8a83e79 100644
--- a/src/java/com/threerings/stats/data/StringSetStat.java
+++ b/src/java/com/threerings/stats/data/StringSetStat.java
@@ -45,7 +45,7 @@ public abstract class StringSetStat extends Stat
         System.arraycopy(_values, iidx, values, iidx+1, (_values.length-iidx));
         values[iidx] = key;
         _values = values;
-        _modified = true;
+        setModified(true);
         return true;
     }