diff --git a/include/flash.h b/include/flash.h
index eec09b4..8aff7a1 100644
--- a/include/flash.h
+++ b/include/flash.h
@@ -524,6 +524,7 @@
 /* helpers.c */
 bool flashprog_no_data(const void *raw_data, size_t);
 int flashprog_read_chunked(struct flashctx *, uint8_t *dst, unsigned int start, unsigned int len, unsigned int chunksize, readfunc_t *);
+int flashprog_limit_chip(struct flashctx *);
 uint32_t address_to_bits(uint32_t addr);
 unsigned int bitcount(unsigned long a);
 #undef MIN