diff --git a/CHANGELOG b/CHANGELOG
index 9538406c83..5711abbbd6 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,7 @@
 === HEAD
 
+* Allow lambda procs with 0 arity as virtual row blocks on ruby 1.9 (jeremyevans)
+
 * Handle schema-qualified row_types in the pg_array integration in the pg_row extension (jeremyevans) (#595)
 
 * Support default_schema when reseting primary key sequences on PostgreSQL (jeremyevans) (#596)
diff --git a/lib/sequel/core.rb b/lib/sequel/core.rb
index 9e6976fbda..0a20e448b5 100644
--- a/lib/sequel/core.rb
+++ b/lib/sequel/core.rb
@@ -390,7 +390,7 @@ def self.virtual_row(&block)
     vr = SQL::VirtualRow.new
     case block.arity
     when -1, 0
-      vr.instance_eval(&block)
+      vr.instance_exec(&block)
     else
       block.call(vr)
     end  
diff --git a/lib/sequel/sql.rb b/lib/sequel/sql.rb
index 40e5a28ea8..35ac4a6b85 100644
--- a/lib/sequel/sql.rb
+++ b/lib/sequel/sql.rb
@@ -6,7 +6,7 @@ module Sequel
     class BasicObject
       # The instance methods to not remove from the class when removing
       # other methods.
-      KEEP_METHODS = %w"__id__ __send__ __metaclass__ instance_eval == equal? initialize method_missing"
+      KEEP_METHODS = %w"__id__ __send__ __metaclass__ instance_eval instance_exec == equal? initialize method_missing"
 
       # Remove all but the most basic instance methods from the class.  A separate
       # method so that it can be called again if necessary if you load libraries
diff --git a/spec/core/expression_filters_spec.rb b/spec/core/expression_filters_spec.rb
index 89af460e70..507a76f6af 100644
--- a/spec/core/expression_filters_spec.rb
+++ b/spec/core/expression_filters_spec.rb
@@ -594,6 +594,11 @@ def l(arg, should)
     l(Sequel.expr(proc{|v| @o}) + 1, "(foo + 1)")
   end
 
+  it "Sequel.expr should handle lambda proc virtual rows" do
+    l(Sequel.expr(&lambda{1}), "1")
+    l(Sequel.expr(&lambda{|| 1}), "1")
+  end
+
   it "Sequel.expr should raise an error if given an argument and a block" do
     proc{Sequel.expr(nil){}}.should raise_error(Sequel::Error)
   end