Fixes: 72b1bd9 ("jack: Make the running state tracing code more robust to multi-thread access.")
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
 AM_LDFLAGS = -module -avoid-version -export-dynamic -no-undefined $(LDFLAGS_NOUNDEFINED)
 
 libasound_module_pcm_jack_la_SOURCES = pcm_jack.c
-libasound_module_pcm_jack_la_LIBADD = @ALSA_LIBS@ @JACK_LIBS@
+libasound_module_pcm_jack_la_LIBADD = @ALSA_LIBS@ @JACK_LIBS@ -lpthread
 
 include ../install-hooks.am