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-rw-r--r--src/backend_libpng.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend_libpng.h b/src/backend_libpng.h
index be0d0b5..7370576 100644
--- a/src/backend_libpng.h
+++ b/src/backend_libpng.h
@@ -4,6 +4,6 @@
struct imv_backend;
/* Create an instance of the libpng backend */
-struct imv_backend *imv_backend_libpng(void);
+const struct imv_backend *imv_backend_libpng(void);
#endif