diff --git a/include/common/buf.h b/include/common/buf.h
index 488c406..b7a5df3 100644
--- a/include/common/buf.h
+++ b/include/common/buf.h
@@ -352,7 +352,7 @@
  *   =0 : not enough data available. <blk*> are left undefined.
  * The buffer is left unaffected. Unused buffers are left in an undefined state.
  */
-static inline size_t b_getblk_nc(const struct buffer *buf, const char **blk1, int *len1, const char **blk2, int *len2, size_t ofs, size_t max)
+static inline size_t b_getblk_nc(const struct buffer *buf, const char **blk1, size_t *len1, const char **blk2, size_t *len2, size_t ofs, size_t max)
 {
 	size_t l1;
 
diff --git a/include/proto/channel.h b/include/proto/channel.h
index eedeaae..026574f 100644
--- a/include/proto/channel.h
+++ b/include/proto/channel.h
@@ -48,13 +48,13 @@
 int ci_putblk(struct channel *chn, const char *str, int len);
 struct buffer *ci_swpbuf(struct channel *chn, struct buffer *buf);
 int ci_putchr(struct channel *chn, char c);
-int ci_getline_nc(const struct channel *chn, char **blk1, int *len1, char **blk2, int *len2);
-int ci_getblk_nc(const struct channel *chn, char **blk1, int *len1, char **blk2, int *len2);
+int ci_getline_nc(const struct channel *chn, char **blk1, size_t *len1, char **blk2, size_t *len2);
+int ci_getblk_nc(const struct channel *chn, char **blk1, size_t *len1, char **blk2, size_t *len2);
 int co_inject(struct channel *chn, const char *msg, int len);
 int co_getline(const struct channel *chn, char *str, int len);
 int co_getblk(const struct channel *chn, char *blk, int len, int offset);
-int co_getline_nc(const struct channel *chn, const char **blk1, int *len1, const char **blk2, int *len2);
-int co_getblk_nc(const struct channel *chn, const char **blk1, int *len1, const char **blk2, int *len2);
+int co_getline_nc(const struct channel *chn, const char **blk1, size_t *len1, const char **blk2, size_t *len2);
+int co_getblk_nc(const struct channel *chn, const char **blk1, size_t *len1, const char **blk2, size_t *len2);
 
 
 /* returns a pointer to the stream the channel belongs to */