diff --git a/Makefile.am b/Makefile.am
index 5569413b..ddeb3efd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -32,6 +32,7 @@ libuv_la_LDFLAGS = -no-undefined -version-info 1:0:0
 libuv_la_SOURCES = src/fs-poll.c \
                    src/heap-inl.h \
                    src/idna.c \
+                   src/idna.h \
                    src/inet.c \
                    src/queue.h \
                    src/strscpy.c \