1 files changed, 1 insertions, 1 deletions
diff --git a/src/ln.c b/src/ln.c
index 9523560f5..4b9c9949a 100644
--- a/src/ln.c
+++ b/src/ln.c
@@ -58,7 +58,7 @@
 #endif
 
 /* The name by which the program was run, for error messages.  */
-char *program_name;
+char const *program_name;
 
 /* FIXME: document */
 static enum backup_type backup_type;