diff -rupN whysynth-20120903.org/src/dssp_synth.c whysynth-20120903/src/dssp_synth.c
--- whysynth-20120903.org/src/dssp_synth.c	2010-06-30 14:21:42.000000000 -0400
+++ whysynth-20120903/src/dssp_synth.c	2016-02-14 16:22:55.711040255 -0500
@@ -79,13 +79,13 @@ dssp_voicelist_mutex_trylock(y_synth_t *
     return 0;
 }
 
-inline int
+int
 dssp_voicelist_mutex_lock(y_synth_t *synth)
 {
     return pthread_mutex_lock(&synth->voicelist_mutex);
 }
 
-inline int
+int
 dssp_voicelist_mutex_unlock(y_synth_t *synth)
 {
     return pthread_mutex_unlock(&synth->voicelist_mutex);