diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index ac13f0f..c39327e 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -412,7 +412,7 @@
 	while (1) {
 		l = strcspn(str, "\"\\");
 		if (l) {
-			fwrite(str, l, 1, out);
+			xfwrite(str, l, 1, out);
 			str += l;
 		}
 		if (!*str)
diff --git a/scripts/kconfig/expr.c b/scripts/kconfig/expr.c
index 8f18e37..330e7c0 100644
--- a/scripts/kconfig/expr.c
+++ b/scripts/kconfig/expr.c
@@ -1087,7 +1087,7 @@
 
 static void expr_print_file_helper(void *data, struct symbol *sym, const char *str)
 {
-	fwrite(str, strlen(str), 1, data);
+	xfwrite(str, strlen(str), 1, data);
 }
 
 void expr_fprint(struct expr *e, FILE *out)
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 76db065..2ac33f5 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -80,6 +80,13 @@
 void sym_add_change_count(int count);
 void conf_set_all_new_symbols(enum conf_def_mode mode);
 
+/* confdata.c and expr.c */
+static inline void xfwrite(const void *str, size_t len, size_t count, FILE *out)
+{
+	if (fwrite(str, len, count, out) < count)
+		fprintf(stderr, "\nError in writing or end of file.\n");
+}
+
 /* kconfig_load.c */
 void kconfig_load(void);