diff --git a/ruby.spec b/ruby.spec
index dd6b138..4152f89 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -576,10 +576,10 @@ done
 
 # Install a tapset and fix up the path to the library.
 mkdir -p %{buildroot}%{tapset_dir}
-sed -e "s|@LIBRARY_PATH@|%{tapset_libdir}/libruby.so.%{ruby_version}|" \
-  %{SOURCE2} > %{buildroot}%{tapset_dir}/libruby.so.%{ruby_version}.stp
+sed -e "s|@LIBRARY_PATH@|%{tapset_libdir}/libruby.so.%{major_minor_version}|" \
+  %{SOURCE2} > %{buildroot}%{tapset_dir}/libruby.so.%{major_minor_version}.stp
 # Escape '*/' in comment.
-sed -i -r "s|( \*.*\*)\/(.*)|\1\\\/\2|" %{buildroot}%{tapset_dir}/libruby.so.%{ruby_version}.stp
+sed -i -r "s|( \*.*\*)\/(.*)|\1\\\/\2|" %{buildroot}%{tapset_dir}/libruby.so.%{major_minor_version}.stp
 
 %check
 # Sanity check that SystemTap (dtrace) was detected.