diff --git a/lib/controller/controller.py b/lib/controller/controller.py
index 5b2f59821..e0cdcfd2f 100644
--- a/lib/controller/controller.py
+++ b/lib/controller/controller.py
@@ -512,14 +512,14 @@ def start():
                             errMsg += " You can give it a go with the switch '--text-only' "
                             errMsg += "if the target page has a low percentage "
                             errMsg += "of textual content (~%.2f%% of " % percent
-                            errMsg += "page content is text)"
+                            errMsg += "page content is text)."
                         elif percent < LOW_TEXT_PERCENT and not kb.errorIsNone:
                             errMsg += " Please retry with the switch '--text-only' "
                             errMsg += "(along with --technique=BU) as this case "
                             errMsg += "looks like a perfect candidate "
                             errMsg += "(low textual content along with inability "
                             errMsg += "of comparison engine to detect at least "
-                            errMsg += "one dynamic parameter)"
+                            errMsg += "one dynamic parameter)."
 
                     if kb.heuristicTest:
                         errMsg += " As heuristic test turned out positive you are "