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-rw-r--r--src/directory_save.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/directory_save.h b/src/directory_save.h
index 626c99c73..2d0056830 100644
--- a/src/directory_save.h
+++ b/src/directory_save.h
@@ -28,7 +28,7 @@
struct directory;
void
-directory_save(FILE *fp, struct directory *directory);
+directory_save(FILE *fp, const struct directory *directory);
bool
directory_load(FILE *fp, struct directory *directory,