diff --git a/platform/msb430/dev/sd.c b/platform/msb430/dev/sd.c
index 512644348..cb3154c1e 100755
--- a/platform/msb430/dev/sd.c
+++ b/platform/msb430/dev/sd.c
@@ -385,12 +385,6 @@ read_register(int register_cmd, char *buf, int register_size)
   return read_block(register_cmd, 0, buf, register_size);
 }
 /*---------------------------------------------------------------------------*/
-unsigned
-sd_get_block_size(void)
-{
-  return SD_BLOCK_SIZE;
-}
-/*---------------------------------------------------------------------------*/
 sd_offset_t
 sd_get_capacity(void)
 {
diff --git a/platform/msb430/dev/sd.h b/platform/msb430/dev/sd.h
index a1470db48..2197e8e3f 100644
--- a/platform/msb430/dev/sd.h
+++ b/platform/msb430/dev/sd.h
@@ -72,7 +72,6 @@ int sd_write(sd_offset_t, char *, unsigned);
 int sd_read(sd_offset_t, char *, unsigned);
 int sd_write_block(sd_offset_t, char *);
 int sd_read_block(sd_offset_t, char *);
-unsigned sd_get_block_size(void);
 sd_offset_t sd_get_capacity(void);
 char *sd_error_string(int);