1 files changed, 1 insertions, 1 deletions
diff --git a/src/env.c b/src/env.c
index bf8ceb2ca..5103cc927 100644
--- a/src/env.c
+++ b/src/env.c
@@ -97,7 +97,7 @@ int putenv ();
 extern char **environ;
 
 /* The name by which this program was run. */
-char *program_name;
+char const *program_name;
 
 static struct option const longopts[] =
 {