diff --git a/scripts/kconfig/gconf.c b/scripts/kconfig/gconf.c
index adc230638c5b..f2bee70e26f4 100644
--- a/scripts/kconfig/gconf.c
+++ b/scripts/kconfig/gconf.c
@@ -10,6 +10,7 @@
 #  include <config.h>
 #endif
 
+#include <stdlib.h>
 #include "lkc.h"
 #include "images.c"
 
@@ -22,7 +23,6 @@
 #include <string.h>
 #include <unistd.h>
 #include <time.h>
-#include <stdlib.h>
 
 //#define DEBUG
 
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 7aa9db0b2a77..7577a7fbb405 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -41,7 +41,7 @@ extern "C" {
 #endif
 static inline const char *CONFIG_prefix(void)
 {
-	return CONFIG_;
+	return getenv( "CONFIG_" ) ?: CONFIG_;
 }
 #undef CONFIG_
 #define CONFIG_ CONFIG_prefix()
diff --git a/scripts/kconfig/nconf.c b/scripts/kconfig/nconf.c
index 261f926d8f4b..ce93e879a29c 100644
--- a/scripts/kconfig/nconf.c
+++ b/scripts/kconfig/nconf.c
@@ -7,6 +7,7 @@
  */
 #define _GNU_SOURCE
 #include <string.h>
+#include <stdlib.h>
 
 #include "lkc.h"
 #include "nconf.h"