diff --git a/makeicecat b/makeicecat
index 8dc5d11..c210c00 100755
--- a/makeicecat
+++ b/makeicecat
@@ -190,7 +190,9 @@ fetch_source()
             echo Removing existing invalid Firefox tarball
             rm -f ${SOURCEBALL}
         fi
-    else
+    fi
+    if ! [[ -f ${SOURCEBALL} ]]
+    then
         # source-ball missing, download it
         echo Downloading Firefox tarball
         wget -N ${SOURCEBALL_URL}