diff --git a/sys/arm64/arm64/gic_v3_var.h b/sys/arm64/arm64/gic_v3_var.h
--- a/sys/arm64/arm64/gic_v3_var.h
+++ b/sys/arm64/arm64/gic_v3_var.h
@@ -111,7 +111,6 @@
 /* ivars */
 enum {
 	GICV3_IVAR_NIRQS = BUS_IVARS_GIC3,
-	_GICV3_IVAR_REDIST_VADDR,	/* unused */
 	GICV3_IVAR_REDIST,
 	GICV3_IVAR_FLAGS,
 };
diff --git a/sys/dev/acpica/acpivar.h b/sys/dev/acpica/acpivar.h
--- a/sys/dev/acpica/acpivar.h
+++ b/sys/dev/acpica/acpivar.h
@@ -277,7 +277,6 @@
  */
 enum {
 	ACPI_IVAR_HANDLE = BUS_IVARS_ACPI,
-	ACPI_IVAR_UNUSED,		/* Unused/reserved. */
 	ACPI_IVAR_PRIVATE,
 	ACPI_IVAR_FLAGS,
 	ACPI_IVAR_DOMAIN