diff --git a/lib/cpp/Makefile.am b/lib/cpp/Makefile.am
index b085ac4..253b68e 100644
--- a/lib/cpp/Makefile.am
+++ b/lib/cpp/Makefile.am
@@ -163,8 +163,7 @@
                      src/async/TAsyncBufferProcessor.h \
                      src/async/TAsyncProtocolProcessor.h \
                      src/async/TEvhttpClientChannel.h \
-                     src/async/TEvhttpServer.h \
-                     src/async/SimpleCallback.h
+                     src/async/TEvhttpServer.h
 
 
 noinst_PROGRAMS = concurrency_test