1 files changed, 4 insertions, 2 deletions
diff --git a/lib/transfer.c b/lib/transfer.c
index 5fab2ffbe..93df4c589 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -137,8 +137,10 @@ CURLcode Curl_fillreadbuffer(struct connectdata *conn, int bytes, int *nreadp)
     conn->upload_fromhere += 10; /* 32bit hex + CRLF */
   }
 
-  nread = conn->fread(conn->upload_fromhere, 1,
-                      buffersize, conn->fread_in);
+  /* this function returns a size_t, so we typecast to int to prevent warnings
+     with picky compilers */
+  nread = (int)conn->fread(conn->upload_fromhere, 1,
+                           buffersize, conn->fread_in);
 
   if(nread == CURL_READFUNC_ABORT) {
     failf(data, "operation aborted by callback\n");