diff --git a/Doc/paper-a4/.cvsignore b/Doc/paper-a4/.cvsignore
index 6c95f4dccbf..60447c3c713 100644
--- a/Doc/paper-a4/.cvsignore
+++ b/Doc/paper-a4/.cvsignore
@@ -9,3 +9,4 @@
 *.pdf
 *.bkm
 *.tar.gz
+*.syn
diff --git a/Doc/paper-letter/.cvsignore b/Doc/paper-letter/.cvsignore
index 6c95f4dccbf..60447c3c713 100644
--- a/Doc/paper-letter/.cvsignore
+++ b/Doc/paper-letter/.cvsignore
@@ -9,3 +9,4 @@
 *.pdf
 *.bkm
 *.tar.gz
+*.syn