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-rw-r--r--gdb/environ.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/gdb/environ.h b/gdb/environ.h
index 1aa13944518..4485b04a52b 100644
--- a/gdb/environ.h
+++ b/gdb/environ.h
@@ -44,7 +44,7 @@ extern char *get_in_environ (const struct environ *, const char *);
extern void set_in_environ (struct environ *, const char *, const char *);
-extern void unset_in_environ (struct environ *, char *);
+extern void unset_in_environ (struct environ *, const char *);
extern char **environ_vector (struct environ *);