--- scripts/kconfig/lkc.h
+++ scripts/kconfig/lkc.h
@@ -20,15 +20,7 @@
 
 #define SRCTREE "srctree"
 
-#ifndef CONFIG_
-#define CONFIG_ "CONFIG_"
-#endif
-static inline const char *CONFIG_prefix(void)
-{
-	return getenv( "CONFIG_" ) ?: CONFIG_;
-}
-#undef CONFIG_
-#define CONFIG_ CONFIG_prefix()
+#define CONFIG_ ""
 
 extern int yylineno;
 void zconfdump(FILE *out);