diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_impl.h b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_impl.h
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_impl.h
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_impl.h
@@ -331,6 +331,7 @@
 	int dt_stdout_fd;	/* file descriptor for saved stdout */
 #else
 	FILE *dt_freopen_fp;	/* file pointer for freopened stdout */
+	char bootfile[MAXPATHLEN];	/* kernel boot file */
 #endif
 	dtrace_handle_err_f *dt_errhdlr; /* error handler, if any */
 	void *dt_errarg;	/* error handler argument */
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
@@ -1311,19 +1311,18 @@
 	 */
 #ifndef illumos
 	{
-	char bootfile[MAXPATHLEN];
 	char *p;
 	int i;
-	size_t len = sizeof(bootfile);
+	size_t len = sizeof(dtp->bootfile);
 
 	/* This call shouldn't fail, but use a default just in case. */
-	if (sysctlbyname("kern.bootfile", bootfile, &len, NULL, 0) != 0)
-		strlcpy(bootfile, "kernel", sizeof(bootfile));
+	if (sysctlbyname("kern.bootfile", dtp->bootfile, &len, NULL, 0) != 0)
+		strlcpy(dtp->bootfile, "/boot/kernel/kernel", sizeof(dtp->bootfile));
 
-	if ((p = strrchr(bootfile, '/')) != NULL)
+	if ((p = strrchr(dtp->bootfile, '/')) != NULL)
 		p++;
 	else
-		p = bootfile;
+		p = dtp->bootfile;
 
 	/*
 	 * Format the global variables based on the kernel module name.