diff --git a/driver/dtrace_linux.c b/driver/dtrace_linux.c
index 36dc970..e4db1ca 100644
--- a/driver/dtrace_linux.c
+++ b/driver/dtrace_linux.c
@@ -1815,7 +1815,7 @@ return 0;
 /*   shadow_procs for this purpose now.				      */
 /**********************************************************************/
 static struct par_alloc_t *hd_par;
-static mutex_t par_mutex;
+static MUTEX_DEFINE(par_mutex);
 
 void *
 par_alloc(int domain, void *ptr, int size, int *init)