diff --git a/lookaside_upload b/lookaside_upload
index 911313b..e971af9 100755
--- a/lookaside_upload
+++ b/lookaside_upload
@@ -110,5 +110,13 @@ curl ${lookaside_baseurl}/sources/upload.cgi \
 	--progress-bar | tee /dev/null
 
 f_log "Returned value: $?"
-f_log "Source should be available at ${lookaside_baseurl}/sources/${pkgname}/${branch}/${checksum}"
+f_log "Validating that source was correctly uploaded ...."
+local_size=$(stat -c %s ${file})
+remote_size=$(curl --silent -i --head ${lookaside_baseurl}/sources/${pkgname}/${branch}/${checksum}|grep "Content-Length"|cut -f 2 -d ':'|tr -d [:blank:]|tr -d '\r')
+if [ "$local_size" -eq "$remote_size" ] ; then
+  f_log "Source should be available at ${lookaside_baseurl}/sources/${pkgname}/${branch}/${checksum}"
+else
+  f_log "ERROR : it seems there is a mismatch with source size and remote file size"
+fi
+