diff --git a/compiler/cpp/Makefile.am b/compiler/cpp/Makefile.am
index b1b6b01..1d39a35 100644
--- a/compiler/cpp/Makefile.am
+++ b/compiler/cpp/Makefile.am
@@ -64,6 +64,9 @@
 if THRIFT_GEN_java
 thrift_SOURCES += src/generate/t_java_generator.cc
 endif
+if THRIFT_GEN_as3
+thrift_SOURCES += src/generate/t_as3_generator.cc
+endif
 if THRIFT_GEN_csharp
 thrift_SOURCES += src/generate/t_csharp_generator.cc
 endif