diff --git a/sdf/SdfReader.cc b/sdf/SdfReader.cc
index c9adff15..b783006b 100644
--- a/sdf/SdfReader.cc
+++ b/sdf/SdfReader.cc
@@ -120,6 +120,7 @@ SdfReader::SdfReader(const char *filename,
   is_incremental_only_(is_incremental_only),
   cond_use_(cond_use),
   line_(1),
+  divider_('/'),
   escape_('\\'),
   instance_(nullptr),
   cell_name_(nullptr),