diff --git a/tools/dtoc/dtoc.py b/tools/dtoc/dtoc.py
index 11050b6..6df7b0d 100755
--- a/tools/dtoc/dtoc.py
+++ b/tools/dtoc/dtoc.py
@@ -54,6 +54,7 @@
     str = name.replace('@', '_at_')
     str = str.replace('-', '_')
     str = str.replace(',', '_')
+    str = str.replace('.', '_')
     str = str.replace('/', '__')
     return str