diff --git a/sys/arm64/coresight/coresight.h b/sys/arm64/coresight/coresight.h
--- a/sys/arm64/coresight/coresight.h
+++ b/sys/arm64/coresight/coresight.h
@@ -37,6 +37,7 @@
 #include "opt_platform.h"
 
 #include <sys/bus.h>
+#include <sys/malloc.h>
 
 #ifdef FDT
 #include <dev/ofw/openfirm.h>
diff --git a/sys/conf/files.arm64 b/sys/conf/files.arm64
--- a/sys/conf/files.arm64
+++ b/sys/conf/files.arm64
@@ -88,7 +88,7 @@
 arm64/coresight/coresight_fdt.c			optional fdt
 arm64/coresight/coresight_if.m			standard
 arm64/coresight/coresight_cmd.c			standard
-arm64/coresight/coresight_cpu_debug.c		standard
+arm64/coresight/coresight_cpu_debug.c		optional fdt
 arm64/coresight/coresight_etm4x.c		standard
 arm64/coresight/coresight_etm4x_acpi.c		optional acpi
 arm64/coresight/coresight_etm4x_fdt.c		optional fdt