diff --git a/Wrap/Swig/DoxyfileSwig.in b/Wrap/Swig/DoxyfileSwig.in
index ebfa21a5d84184526481e676ede8b42e226f83f4..9dcae3539b4fbd66c0ff9e43317cd639d7c307c9 100644
--- a/Wrap/Swig/DoxyfileSwig.in
+++ b/Wrap/Swig/DoxyfileSwig.in
@@ -902,7 +902,7 @@ RECURSIVE              = YES
 # Note that relative paths are relative to the directory from which doxygen is
 # run.
 
-EXCLUDE                = 3rdParty
+EXCLUDE                = 3rdparty
 
 # The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
 # directories that are symbolic links (a Unix file system feature) are excluded