diff --git a/ruby.spec b/ruby.spec
index 0b7cde0..5b13a94 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -355,6 +355,7 @@ BuildRequires: readline-devel
 # Needed to pass test_set_program_name(TestRubyOptions)
 BuildRequires: procps
 %{?with_systemtap:BuildRequires: %{_bindir}/dtrace}
+%{?with_systemtap:BuildRequires: systemtap-sdt-devel}
 # RubyGems test suite optional dependencies.
 %{?with_git:BuildRequires: git}
 %{?with_cmake:BuildRequires: %{_bindir}/cmake}