diff --git a/specifications/activesupport-3.0.15.gemspec.orig b/specifications/activesupport-3.0.15.gemspec
index 0277593..ef9b71d 100644
--- a/specifications/activesupport-3.0.15.gemspec.orig
+++ b/specifications/activesupport-3.0.15.gemspec
@@ -20,8 +20,11 @@ Gem::Specification.new do |s|
     s.specification_version = 3
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
+      s.add_runtime_dependency("bigdecimal", ">= 0")
     else
+      s.add_dependency("bigdecimal", ">= 0")
     end
   else
+    s.add_dependency("bigdecimal", ">= 0")
   end
 end