1 files changed, 1 insertions, 1 deletions
diff --git a/src/cat.c b/src/cat.c
index 87bcc368b..fd6c9df0d 100644
--- a/src/cat.c
+++ b/src/cat.c
@@ -52,7 +52,7 @@
 #define max(h,i) ((h) > (i) ? (h) : (i))
 
 /* Name under which this program was invoked.  */
-char *program_name;
+char const *program_name;
 
 /* Name of input file.  May be "-".  */
 static char const *infile;