1 files changed, 1 insertions, 0 deletions
diff --git a/Makefile.am b/Makefile.am
index aa3234bf5..4d1e5620d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -167,6 +167,7 @@ src_mpd_SOURCES = \
 	$(OUTPUT_API_SRC) \
 	$(MIXER_API_SRC) \
 	src/thread/Mutex.hxx \
+	src/thread/PosixMutex.hxx \
 	src/thread/CriticalSection.hxx \
 	src/glib_socket.h \
 	src/clock.c src/clock.h \