diff --git a/flash.h b/flash.h
index c6a53b16f..3baa07655 100644
--- a/flash.h
+++ b/flash.h
@@ -344,7 +344,6 @@ int read_memmapped(struct flashctx *flash, uint8_t *buf, unsigned int start, uns
 int erase_flash(struct flashctx *flash);
 int probe_flash(struct registered_master *mst, int startchip, struct flashctx *fill_flash, int force);
 int read_flash_to_file(struct flashctx *flash, const char *filename);
-char *extract_param(const char *const *haystack, const char *needle, const char *delim);
 int verify_range(struct flashctx *flash, const uint8_t *cmpbuf, unsigned int start, unsigned int len);
 int need_erase(const uint8_t *have, const uint8_t *want, unsigned int len, enum write_granularity gran, const uint8_t erased_value);
 void print_version(void);
diff --git a/flashrom.c b/flashrom.c
index 6cc899f87..1f94f33d2 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -272,7 +272,7 @@ int read_memmapped(struct flashctx *flash, uint8_t *buf, unsigned int start,
  * needle and remove everything from the first occurrence of needle to the next
  * delimiter from haystack.
  */
-char *extract_param(const char *const *haystack, const char *needle, const char *delim)
+static char *extract_param(const char *const *haystack, const char *needle, const char *delim)
 {
 	char *param_pos, *opt_pos, *rest;
 	char *opt = NULL;