diff --git a/src/ZNCString.cpp b/src/ZNCString.cpp
index 96000f17..99c35c87 100644
--- a/src/ZNCString.cpp
+++ b/src/ZNCString.cpp
@@ -970,6 +970,7 @@ bool CString::ToBool() const {
 	CString sTrimmed = Trim_n();
 	return (!sTrimmed.Trim_n("0").empty() &&
 			!sTrimmed.Equals("false") &&
+			!sTrimmed.Equals("off") &&
 			!sTrimmed.Equals("no") &&
 			!sTrimmed.Equals("n"));
 }