diff --git a/ChangeLog b/ChangeLog
index 2ba706d..c8241d5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Sun Apr 26 23:39:56 2009  Minero Aoki  <aamine@loveruby.net>
+
+	* net/loveruby/cflat/ir/Expr.java: show Expr type on dump.
+
+	* net/loveruby/cflat/type/FunctionType.java: FunctionType#toString
+	  should separate each argument types by ",".
+
 Sun Apr 26 23:35:07 2009  Minero Aoki  <aamine@loveruby.net>
 
 	* net/loveruby/cflat/ir: implement IR#dump.
diff --git a/net/loveruby/cflat/ir/Expr.java b/net/loveruby/cflat/ir/Expr.java
index b1bc9eb..2c72b07 100644
--- a/net/loveruby/cflat/ir/Expr.java
+++ b/net/loveruby/cflat/ir/Expr.java
@@ -35,6 +35,7 @@ abstract public class Expr implements Dumpable {
 
     public void dump(Dumper d) {
         d.printClass(this);
+        d.printMember("type", type);
         _dump(d);
     }
 
diff --git a/net/loveruby/cflat/type/FunctionType.java b/net/loveruby/cflat/type/FunctionType.java
index fb01095..9517305 100644
--- a/net/loveruby/cflat/type/FunctionType.java
+++ b/net/loveruby/cflat/type/FunctionType.java
@@ -65,11 +65,14 @@ public class FunctionType extends Type {
     }
 
     public String toString() {
+        String sep = "";
         StringBuffer buf = new StringBuffer();
         buf.append(returnType.toString());
         buf.append(" (*)(");
         for (Type t : paramTypes.types()) {
+            buf.append(sep);
             buf.append(t.toString());
+            sep = ", ";
         }
         buf.append(")");
         return buf.toString();