1 files changed, 2 insertions, 2 deletions
diff --git a/source/fitz/buffer.c b/source/fitz/buffer.c
index d1609ef1..6f0e7057 100644
--- a/source/fitz/buffer.c
+++ b/source/fitz/buffer.c
@@ -41,13 +41,13 @@ fz_new_buffer_from_data(fz_context *ctx, unsigned char *data, int size)
 }
 
 fz_buffer *
-fz_new_buffer_from_shared_data(fz_context *ctx, unsigned char *data, int size)
+fz_new_buffer_from_shared_data(fz_context *ctx, const char *data, int size)
 {
 	fz_buffer *b;
 
 	b = fz_malloc_struct(ctx, fz_buffer);
 	b->refs = 1;
-	b->data = data;
+	b->data = (unsigned char *)data; /* cast away const */
 	b->cap = size;
 	b->len = size;
 	b->unused_bits = 0;