diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 6c204318bc94..866369f10ff8 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -5,6 +5,7 @@
 
 #include <locale.h>
 #include <ctype.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -41,7 +42,7 @@ static int tty_stdio;
 static int valid_stdin = 1;
 static int sync_kconfig;
 static int conf_cnt;
-static char line[128];
+static char line[PATH_MAX];
 static struct menu *rootEntry;
 
 static void print_help(struct menu *menu)
@@ -109,7 +110,7 @@ static int conf_askvalue(struct symbol *sym, const char *def)
 		/* fall through */
 	case oldaskconfig:
 		fflush(stdout);
-		xfgets(line, 128, stdin);
+		xfgets(line, sizeof(line), stdin);
 		if (!tty_stdio)
 			printf("\n");
 		return 1;
@@ -311,7 +312,7 @@ static int conf_choice(struct menu *menu)
 			/* fall through */
 		case oldaskconfig:
 			fflush(stdout);
-			xfgets(line, 128, stdin);
+			xfgets(line, sizeof(line), stdin);
 			strip(line);
 			if (line[0] == '?') {
 				print_help(menu);