1 files changed, 1 insertions, 1 deletions
diff --git a/src/sum.c b/src/sum.c
index 28bd05235..a2aa94570 100644
--- a/src/sum.c
+++ b/src/sum.c
@@ -37,7 +37,7 @@
   proper_name ("David MacKenzie")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* True if any of the files read were the standard input. */
 static bool have_read_stdin;