diff --git a/configure.ac b/configure.ac
index 515e0b4..dfb06b2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -207,6 +207,8 @@
 AM_CONDITIONAL([THRIFT_GEN_cpp], [test "$ax_thrift_gen_cpp" = "yes"])
 AX_THRIFT_GEN(java, [Java], yes)
 AM_CONDITIONAL([THRIFT_GEN_java], [test "$ax_thrift_gen_java" = "yes"])
+AX_THRIFT_GEN(as3, [AS3], yes)
+AM_CONDITIONAL([THRIFT_GEN_as3], [test "$ax_thrift_gen_as3" = "yes"])
 AX_THRIFT_GEN(csharp, [C#], yes)
 AM_CONDITIONAL([THRIFT_GEN_csharp], [test "$ax_thrift_gen_csharp" = "yes"])
 AX_THRIFT_GEN(py, [Python], yes)