1 files changed, 1 insertions, 1 deletions
diff --git a/src/df.c b/src/df.c
index 20b8f2158..2b320cf98 100644
--- a/src/df.c
+++ b/src/df.c
@@ -43,7 +43,7 @@
   proper_name ("Paul Eggert")
 
 /* Name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* If true, show inode information. */
 static bool inode_format;