diff --git a/libflashrom.h b/libflashrom.h
index 1937194..09a88c4 100644
--- a/libflashrom.h
+++ b/libflashrom.h
@@ -59,7 +59,7 @@
 bool flashrom_flag_get(const struct flashrom_flashctx *, enum flashrom_flag);
 
 int flashrom_image_read(struct flashrom_flashctx *, void *buffer, size_t buffer_len);
-int flashrom_image_write(struct flashrom_flashctx *, const void *buffer, size_t buffer_len);
+int flashrom_image_write(struct flashrom_flashctx *, void *buffer, size_t buffer_len);
 int flashrom_image_verify(struct flashrom_flashctx *, const void *buffer, size_t buffer_len);
 
 struct flashrom_layout;