diff --git a/res/res_musiconhold.c b/res/res_musiconhold.c
index beb9e95787..7a96be5684 100644
--- a/res/res_musiconhold.c
+++ b/res/res_musiconhold.c
@@ -42,9 +42,6 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include <sys/stat.h>
 #include <dirent.h>
 #include <sys/ioctl.h>
-#ifdef SOLARIS
-#include <thread.h>
-#endif
 
 #ifdef HAVE_DAHDI
 #include <dahdi/user.h>