diff --git a/doc/Text-CSV.md b/doc/Text-CSV.md
index 0639b05..4cb2ae0 100644
--- a/doc/Text-CSV.md
+++ b/doc/Text-CSV.md
@@ -2669,7 +2669,7 @@ And below should be the complete list of error codes that can be returned:
 
     The header line parsed in the ["header"](#header) is contains an empty field.
 
-- 1013 "INI - the header contains nun-unique fields"
+- 1013 "INI - the header contains non-unique fields"
 
 
     The header line parsed in the ["header"](#header) contains at least two identical
diff --git a/doc/Text-CSV.pod b/doc/Text-CSV.pod
index 2173499..c2b6920 100644
--- a/doc/Text-CSV.pod
+++ b/doc/Text-CSV.pod
@@ -2806,7 +2806,7 @@ X<1012>
 The header line parsed in the L</header> is contains an empty field.
 
 =item *
-1013 "INI - the header contains nun-unique fields"
+1013 "INI - the header contains non-unique fields"
 X<1013>
 
 The header line parsed in the L</header> contains at least two identical
diff --git a/lib/Text/CSV.rakumod b/lib/Text/CSV.rakumod
index 3221369..6ba9f9b 100644
--- a/lib/Text/CSV.rakumod
+++ b/lib/Text/CSV.rakumod
@@ -26,7 +26,7 @@ my constant %errors =
     1010 => "INI - the header is empty",
     1011 => "INI - the header contains more than one valid separator",
     1012 => "INI - the header contains an empty field",
-    1013 => "INI - the header contains nun-unique fields",
+    1013 => "INI - the header contains non-unique fields",
 #   1014 => "INI - header called on undefined stream",
 
     # Syntax errors