diff --git a/src/main/java/com/threerings/presents/tools/ActionScriptUtils.java b/src/main/java/com/threerings/presents/tools/ActionScriptUtils.java
index e3e194a32..cfbfba96f 100644
--- a/src/main/java/com/threerings/presents/tools/ActionScriptUtils.java
+++ b/src/main/java/com/threerings/presents/tools/ActionScriptUtils.java
@@ -274,6 +274,32 @@ public class ActionScriptUtils
         return false;
     }
 
+    /**
+     * Returns the primitive (unboxed) counterpart of a class, or the same class if it isn't a boxed
+     * type.
+     */
+    public static Class<?> toPrimitiveType (Class<?> cclass)
+    {
+        if (Boolean.class == cclass) {
+            return Boolean.TYPE;
+        } else if (Character.class == cclass) {
+            return Character.TYPE;
+        } else if (Byte.class == cclass) {
+            return Byte.TYPE;
+        } else if (Short.class == cclass) {
+            return Short.TYPE;
+        } else if (Integer.class == cclass) {
+            return Integer.TYPE;
+        } else if (Long.class == cclass) {
+            return Long.TYPE;
+        } else if (Float.class == cclass) {
+            return Float.TYPE;
+        } else if (Double.class == cclass) {
+            return Double.TYPE;
+        }
+        return cclass;
+    }
+
     /** Returns if the given class is an implementation of Map that doesn't know about Streaming */
     protected static boolean isNaiveMap (Class<?> type)
     {
diff --git a/src/main/java/com/threerings/presents/tools/GenActionScriptStreamableTask.java b/src/main/java/com/threerings/presents/tools/GenActionScriptStreamableTask.java
index e52d1538e..4b7fdfe28 100644
--- a/src/main/java/com/threerings/presents/tools/GenActionScriptStreamableTask.java
+++ b/src/main/java/com/threerings/presents/tools/GenActionScriptStreamableTask.java
@@ -24,6 +24,8 @@ package com.threerings.presents.tools;
 import java.io.File;
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -165,12 +167,14 @@ public class GenActionScriptStreamableTask extends GenTask
         public final String name;
         public final String capitalName;
         public final String simpleType;
+        public final String parameterTypes;
         public final String reader;
         public final String writer;
         public final String dobjectField;
         public boolean dset;
         public boolean array;
         public boolean oidList;
+        public boolean hasTypeParameters;
 
         public ASField (Field f, ImportSet imports)
         {
@@ -179,6 +183,25 @@ public class GenActionScriptStreamableTask extends GenTask
             dobjectField = StringUtil.unStudlyName(name).toUpperCase();
             simpleType = ActionScriptUtils.addImportAndGetShortType(f.getType(), true, imports);
 
+            List<String> parameters = Lists.newLinkedList();
+            Type genType = f.getGenericType();
+            if (genType instanceof ParameterizedType) {
+                for (Type param : ((ParameterizedType) genType).getActualTypeArguments()) {
+                    if (param instanceof Class) {
+                        // Convert any box classes to primitives to avoid having to import them
+                        Class<?> primitive = ActionScriptUtils.toPrimitiveType((Class<?>) param);
+                        parameters.add(ActionScriptUtils.addImportAndGetShortType(
+                            primitive, false, imports));
+                    }
+                }
+            }
+            if (!parameters.isEmpty()) {
+                parameterTypes = Joiner.on(", ").join(parameters);
+                hasTypeParameters = true;
+            } else {
+                parameterTypes = "";
+            }
+
             // Lists and Maps use their Streamers directly
             if (List.class.isAssignableFrom(f.getType())) {
                 imports.add("com.threerings.io.streamers.ArrayStreamer");
@@ -188,7 +211,6 @@ public class GenActionScriptStreamableTask extends GenTask
                 imports.add("com.threerings.io.streamers.SetStreamer");
             } else if (DSet.class.isAssignableFrom(f.getType())) {
                 dset = true;
-                imports.add("com.threerings.presents.dobj.DSet_Entry"); // Used for signals
             } else if (OidList.class.isAssignableFrom(f.getType())) {
                 oidList = true;
             }
diff --git a/src/main/resources/com/threerings/presents/tools/streamable_as.tmpl b/src/main/resources/com/threerings/presents/tools/streamable_as.tmpl
index 1bf27fc03..216427dbe 100644
--- a/src/main/resources/com/threerings/presents/tools/streamable_as.tmpl
+++ b/src/main/resources/com/threerings/presents/tools/streamable_as.tmpl
@@ -19,16 +19,17 @@ public class {{classname}} {{^extends.isEmpty}}extends {{extends}}
 
 // GENERATED STREAMING START
 {{#pubFields}}
-    public var {{name}} :{{simpleType}};
+    public var {{name}} :{{simpleType}};{{#hasTypeParameters}} /* of */ {{parameterTypes}};{{/hasTypeParameters}}
+
 
 {{/pubFields}}
 {{#dobject}}
 {{#pubFields}}
     public var {{name}}Changed :Signal = new Signal({{simpleType}}, {{simpleType}});
 {{#dset}}
-    public var {{name}}EntryAdded :Signal = new Signal(DSet_Entry);
-    public var {{name}}EntryRemoved :Signal = new Signal(DSet_Entry);
-    public var {{name}}EntryUpdated :Signal = new Signal(DSet_Entry, DSet_Entry);
+    public var {{name}}EntryAdded :Signal = new Signal({{parameterTypes}});
+    public var {{name}}EntryRemoved :Signal = new Signal({{parameterTypes}});
+    public var {{name}}EntryUpdated :Signal = new Signal({{parameterTypes}}, {{parameterTypes}});
 {{/dset}}
 {{#array}}
     public var {{name}}ElementUpdated :Signal = new Signal(int, Object, Object);