diff --git a/hw/isa/Kconfig b/hw/isa/Kconfig
index 7884179d08..5df3c09cd5 100644
--- a/hw/isa/Kconfig
+++ b/hw/isa/Kconfig
@@ -15,7 +15,7 @@ config I82378
 
 config ISA_SUPERIO
     bool
-    select ISA_BUS
+    depends on ISA_BUS
     select PCKBD
     select PARALLEL
     select SERIAL_ISA
@@ -47,6 +47,7 @@ config PIIX
 
 config VT82C686
     bool
+    select ISA_BUS
     select ISA_SUPERIO
     select ACPI
     select ACPI_SMBUS