diff --git a/src/cut.c b/src/cut.c
index 13967d6ef..6fd8978a6 100644
--- a/src/cut.c
+++ b/src/cut.c
@@ -95,7 +95,7 @@ static size_t output_delimiter_length;
 static char *output_delimiter_string;
 
 /* The output delimiter string contents, if the default.  */
-char output_delimiter_default[1];
+static char output_delimiter_default[1];
 
 /* True if we have ever read standard input. */
 static bool have_read_stdin;