diff --git a/ruby.spec b/ruby.spec
index 0d9c2ec..2c5cba5 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -145,6 +145,7 @@ BuildRequires: readline-devel
 BuildRequires: tk-devel
 # Needed to pass test_set_program_name(TestRubyOptions)
 BuildRequires: procps
+BuildRequires: %{_bindir}/dtrace
 
 %description
 Ruby is the interpreted scripting language for quick and easy