diff --git a/Doc/Manual/Preprocessor.html b/Doc/Manual/Preprocessor.html
index c612c56ce..659cb6fa2 100644
--- a/Doc/Manual/Preprocessor.html
+++ b/Doc/Manual/Preprocessor.html
@@ -149,7 +149,7 @@ SWIGXML                         Defined when using XML
 
 <p>
 SWIG also defines <tt>SWIG_VERSION</tt> and a target language macro in
-the generated wrapper file (since SWIG 4.2.0 - in older versions these
+the generated wrapper file (since SWIG 4.1.0 - in older versions these
 were defined for some target languages but this wasn't consistent).  Best
 practice is to use SWIG-time conditional checks because that results in smaller
 generated wrapper sources.