X-Git-Url: http://developer.intra2net.com/git/?p=libftdi;a=blobdiff_plain;f=src%2Fftdi.h;h=a0ad8b423fee2cff269072339cd76ca3f93094fe;hp=3d97dd9e49141e68eabe1ac88c0b9096041423a5;hb=276750c1464b24cd334d483e9ccdab87d9673152;hpb=ca7d32448041e33bdb206241f210ad8961f8d10c

diff --git a/src/ftdi.h b/src/ftdi.h
index 3d97dd9..a0ad8b4 100644
--- a/src/ftdi.h
+++ b/src/ftdi.h
@@ -502,7 +502,7 @@ extern "C"
     int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize);
     int ftdi_read_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize);
 
-    int ftdi_write_data(struct ftdi_context *ftdi, unsigned char *buf, int size);
+    int ftdi_write_data(struct ftdi_context *ftdi, const unsigned char *buf, int size);
     int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize);
     int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize);