diff --git a/rubygem-icalendar.spec b/rubygem-icalendar.spec
index 0540f55..ea85e30 100644
--- a/rubygem-icalendar.spec
+++ b/rubygem-icalendar.spec
@@ -17,6 +17,7 @@ Patch0: rubygem-icalendar-manage_gem.patch
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 Requires: ruby(abi) = %{rubyabi}
 Requires: rubygems
+BuildRequires: dos2unix
 BuildRequires: rubygems
 BuildRequires: rubygem(rake)
 BuildRequires: rubygem(hoe)