diff --git a/strbuf.c b/strbuf.c
index 654330849c..672a1e4097 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -37,6 +37,8 @@ void read_line(struct strbuf *sb, FILE *fp, int term) {
 			break;
 		strbuf_add(sb, ch);
 	}
+	if (ch == EOF && sb->len == 0)
+		sb->eof = 1;
 	strbuf_end(sb);
 }