diff --git a/zxcvbn.c b/zxcvbn.c
index 8e96609..ebe9e31 100644
--- a/zxcvbn.c
+++ b/zxcvbn.c
@@ -934,8 +934,9 @@ typedef struct
     int Shifts;
 } SpatialMatchInfo_t;
 
-/* Shift mapping, characters in pairs: first is shifted, second un-shifted. */
-static const uint8_t UK_Shift[] = "!1\"2$4%5&7(9)0*8:;<,>.?/@'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz^6_-{[|\\}]~#€4£3¬`";
+/* Shift mapping, characters in pairs: first is shifted, second un-shifted. Ordered for increasing shifted character code.*/
+/* Note: on a UK keyboard  \243 is the £ (Pound stirling),  \244 is the ¤ (Euro),  \254 is the ¬ (Not sign)  */
+static const uint8_t UK_Shift[] = "!1\"2$4%5&7(9)0*8:;<,>.?/@'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz^6_-{[|\\}]~#\2433\2444\254`";
 static const uint8_t US_Shift[] = "!1\"'#3$4%5&7(9)0*8:;<,>.?/@2AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz^6_-{[|\\}]~`";