diff --git a/libpkgconf/fileio.c b/libpkgconf/fileio.c
index b64205d..22281f2 100644
--- a/libpkgconf/fileio.c
+++ b/libpkgconf/fileio.c
@@ -20,7 +20,7 @@ char *
 pkgconf_fgetline(char *line, size_t size, FILE *stream)
 {
 	char *s = line;
-	char *end = line + size - 1;
+	char *end = line + size - 2;
 	bool quoted = false;
 	int c = '\0', c2;