diff --git a/ChangeLog b/ChangeLog
index 4d65877830..d35c2c46df 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Aug 25 16:05:50 2006  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* object.c (sym_call): check if the receiver is given.
+
 Wed Aug 23 00:25:14 2006  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/rexml/source.rb (REXML::IOSource#initialize): encoding have to
diff --git a/object.c b/object.c
index d40d19efea..c8c39a3695 100644
--- a/object.c
+++ b/object.c
@@ -1057,8 +1057,12 @@ sym_to_sym(VALUE sym)
 static VALUE
 sym_call(VALUE args, VALUE sym)
 {
-    VALUE obj = RARRAY(args)->ptr[0];
+    VALUE obj;
 
+    if (RARRAY(args)->len < 1) {
+	rb_raise(rb_eArgError, "no receiver given");
+    }
+    obj = RARRAY(args)->ptr[0];
     return rb_funcall3(obj, (ID)sym,
 		       RARRAY(args)->len - 1,
 		       RARRAY(args)->ptr + 1);