diff --git a/sys/pc98/cbus/gdc.c b/sys/pc98/cbus/gdc.c
index 212d02b7faa..eca0454dca2 100644
--- a/sys/pc98/cbus/gdc.c
+++ b/sys/pc98/cbus/gdc.c
@@ -47,6 +47,7 @@
 
 #include <vm/vm.h>
 #include <vm/pmap.h>
+#include <vm/vm_param.h>
 
 #include <machine/md_var.h>
 #include <machine/pc/bios.h>
diff --git a/sys/pc98/pc98/pc98gdc.c b/sys/pc98/pc98/pc98gdc.c
index 212d02b7faa..eca0454dca2 100644
--- a/sys/pc98/pc98/pc98gdc.c
+++ b/sys/pc98/pc98/pc98gdc.c
@@ -47,6 +47,7 @@
 
 #include <vm/vm.h>
 #include <vm/pmap.h>
+#include <vm/vm_param.h>
 
 #include <machine/md_var.h>
 #include <machine/pc/bios.h>