diff --git a/lib/Makefile.am b/lib/Makefile.am
index 6387936a..449282c6 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -48,7 +48,8 @@ OBJECTS = nghttp2_pq.c nghttp2_map.c nghttp2_queue.c \
 	nghttp2_callbacks.c \
 	nghttp2_mem.c \
 	nghttp2_http.c \
-	nghttp2_rcbuf.c
+	nghttp2_rcbuf.c \
+	nghttp2_debug.c
 
 HFILES = nghttp2_pq.h nghttp2_int.h nghttp2_map.h nghttp2_queue.h \
 	nghttp2_frame.h \