diff --git a/data/language/en-GB.txt b/data/language/en-GB.txt
index cdc5280c5b..262d9fc243 100644
--- a/data/language/en-GB.txt
+++ b/data/language/en-GB.txt
@@ -4361,7 +4361,7 @@ STR_6049    :Error reading PNG
 STR_6050    :Error reading bitmap
 STR_6051    :The width and height need to match
 STR_6052    :The heightmap is too big, and will be cut off
-STR_6053    :The heightmap cannot be normalized
+STR_6053    :The heightmap cannot be normalised
 STR_6054    :Only 24-bit bitmaps are supported
 
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