diff --git a/include/import/ist.h b/include/import/ist.h
index a19e228..af9bbac 100644
--- a/include/import/ist.h
+++ b/include/import/ist.h
@@ -554,7 +554,7 @@
  * already been checked. An ist made of the output and its length (not counting
  * the trailing zero) are returned.
  */
-static inline struct ist ist2str(char *dst, const struct ist src, size_t count)
+static inline struct ist ist2str(char *dst, const struct ist src)
 {
 	size_t ofs = 0;
 
@@ -599,7 +599,7 @@
  * the frame length has already been checked. An ist made of the output and its
  * length (not counting the trailing zero) are returned.
  */
-static inline struct ist ist2str_lc(char *dst, const struct ist src, size_t count)
+static inline struct ist ist2str_lc(char *dst, const struct ist src)
 {
 	size_t ofs = 0;
 
@@ -644,7 +644,7 @@
  * the frame length has already been checked. An ist made of the output and its
  * length (not counting the trailing zero) are returned.
  */
-static inline struct ist ist2str_uc(char *dst, const struct ist src, size_t count)
+static inline struct ist ist2str_uc(char *dst, const struct ist src)
 {
 	size_t ofs = 0;