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-rw-r--r--scripts/kconfig/lexer.l7
1 files changed, 5 insertions, 2 deletions
diff --git a/scripts/kconfig/lexer.l b/scripts/kconfig/lexer.l
index 6354c905b006..3bf90d01c39f 100644
--- a/scripts/kconfig/lexer.l
+++ b/scripts/kconfig/lexer.l
@@ -305,8 +305,11 @@ static char *expand_token(const char *in, size_t n)
new_string();
append_string(in, n);
- /* get the whole line because we do not know the end of token. */
- while ((c = input()) != EOF) {
+ /*
+ * get the whole line because we do not know the end of token.
+ * input() returns 0 (not EOF!) when it reachs the end of file.
+ */
+ while ((c = input()) != 0) {
if (c == '\n') {
unput(c);
break;