diff --git a/configure.ac b/configure.ac
index f512871..b4c50b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -95,8 +95,11 @@
 AX_THRIFT_LIB(ruby, [Ruby], yes)
 if test "$with_ruby" = "yes"; then
   AC_PATH_PROG([RUBY], [ruby])
+  AC_PATH_PROG([RSPEC], [spec])
 fi
 AM_CONDITIONAL(WITH_RUBY, [test -n "$RUBY"])
+AM_CONDITIONAL(HAVE_RSPEC, [test -n "$RSPEC"])
+
 
 AC_C_CONST
 AC_C_INLINE