diff --git a/sys/sparc64/sparc64/trap.c b/sys/sparc64/sparc64/trap.c
index 0c07eafd4f7..1e58351e9f5 100644
--- a/sys/sparc64/sparc64/trap.c
+++ b/sys/sparc64/sparc64/trap.c
@@ -84,6 +84,7 @@ __FBSDID("$FreeBSD$");
 #include <machine/frame.h>
 #include <machine/intr_machdep.h>
 #include <machine/ofw_machdep.h>
+#include <machine/pcb.h>
 #include <machine/smp.h>
 #include <machine/trap.h>
 #include <machine/tstate.h>