diff --git a/common/jack/control.h b/common/jack/control.h
index 2aa05420..6360d30a 100644
--- a/common/jack/control.h
+++ b/common/jack/control.h
@@ -31,13 +31,8 @@
 
 #include <jack/jslist.h>
 #include <jack/systemdeps.h>
-#if __STDC_VERSION__ >= 199901L
-#  include <stdbool.h>
-#else
-#  define TRUE 1
-#  define FALSE 0
-#  define bool int
-#  define __bool_true_false_are_defined
+#if !defined (__sun__)
+#include <stdbool.h>
 #endif
 
 /** Parameter types, intentionally similar to jack_driver_param_type_t */