diff --git a/arch/x86/lib/bios.c b/arch/x86/lib/bios.c
index 8cc686f..e29cae7 100644
--- a/arch/x86/lib/bios.c
+++ b/arch/x86/lib/bios.c
@@ -23,7 +23,7 @@
 static int (*int_handler[256])(void);
 
 /* to have a common register file for interrupt handlers */
-#ifndef CONFIG_BIOSEMU
+#if !CONFIG_IS_ENABLED(BIOSEMU)
 X86EMU_sysEnv _X86EMU_env;
 #endif