diff --git a/docs/examples/httpput.c b/docs/examples/httpput.c
index 162a6b0d8..0d360adc7 100644
--- a/docs/examples/httpput.c
+++ b/docs/examples/httpput.c
@@ -87,8 +87,10 @@ int main(int argc, char **argv)
     /* now specify which file to upload */
     curl_easy_setopt(curl, CURLOPT_READDATA, hd_src);
 
-    /* and give the size of the upload */
-    curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, file_info.st_size);
+    /* provide the size of the upload, we specicially typecast the value
+       to curl_off_t since we must be sure to use the correct data size */
+    curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
+                     (curl_off_t)file_info.st_size);
 
     /* Now run off and do what you've been told! */
     res = curl_easy_perform(curl);