1 files changed, 3 insertions, 0 deletions
diff --git a/src/tr.c b/src/tr.c
index ae0055ac6..75c763a10 100644
--- a/src/tr.c
+++ b/src/tr.c
@@ -30,6 +30,9 @@
 #include "long-options.h"
 #include "safe-read.h"
 
+/* The official name of this program (e.g., no `g' prefix).  */
+#define PROGRAM_NAME "tr"
+
 #define N_CHARS (UCHAR_MAX + 1)
 
 /* A pointer to a function that returns an int.  */