diff --git a/mm/iob/iob_trimhead.c b/mm/iob/iob_trimhead.c
index 602ad689503..db72bc69ab0 100644
--- a/mm/iob/iob_trimhead.c
+++ b/mm/iob/iob_trimhead.c
@@ -55,7 +55,7 @@
 FAR struct iob_s *iob_trimhead(FAR struct iob_s *iob, unsigned int trimlen,
                                enum iob_user_e producerid)
 {
-  uint16_t pktlen;
+  unsigned int pktlen;
 
   iobinfo("iob=%p trimlen=%d\n", iob, trimlen);