diff --git a/configure.ac b/configure.ac
index 6c9e4a4..f56a276 100644
--- a/configure.ac
+++ b/configure.ac
@@ -134,6 +134,8 @@
 AM_CONDITIONAL([THRIFT_GEN_csharp], [test "$ax_thrift_gen_csharp" = "yes"])
 AX_THRIFT_GEN(py, [Python], yes)
 AM_CONDITIONAL([THRIFT_GEN_py], [test "$ax_thrift_gen_py" = "yes"])
+AX_THRIFT_GEN(rb, [Ruby], yes)
+AM_CONDITIONAL([THRIFT_GEN_rb], [test "$ax_thrift_gen_rb" = "yes"])
 AX_THRIFT_GEN(cocoa, [Cocoa], yes)
 AM_CONDITIONAL([THRIFT_GEN_cocoa], [test "$ax_thrift_gen_cocoa" = "yes"])
 AX_THRIFT_GEN(st, [Smalltalk], yes)