diff --git a/core/src/ldml/ldml_processor.cpp b/core/src/ldml/ldml_processor.cpp
index 7de84315b6..9ef36b62fc 100644
--- a/core/src/ldml/ldml_processor.cpp
+++ b/core/src/ldml/ldml_processor.cpp
@@ -532,10 +532,10 @@ ldml_event_state::ldml_event_state(
     uint8_t i,
     uint16_t e) {
   this->state          = s;
-  this->vk             = v;
-  this->modifier_state = m;
-  this->is_key_down    = i;
-  this->event_flags    = e;
+  this->_vk             = v;
+  this->_modifier_state = m;
+  this->_is_key_down    = i;
+  this->_event_flags    = e;
 
   actions.persist_options = new km_core_option_item[1];
   actions.persist_options[0] = NULL_OPTIONS[0];
diff --git a/core/src/ldml/ldml_processor.hpp b/core/src/ldml/ldml_processor.hpp
index 6bf8a8fa31..b673a9275c 100644
--- a/core/src/ldml/ldml_processor.hpp
+++ b/core/src/ldml/ldml_processor.hpp
@@ -178,10 +178,10 @@ public:
    size_t context_to_string(std::u32string &str, bool include_markers = true);
 
  private:
-   km_core_virtual_key vk;
-   uint16_t modifier_state;
-   uint8_t is_key_down;
-   uint16_t event_flags;
+   km_core_virtual_key _vk;
+   uint16_t _modifier_state;
+   uint8_t _is_key_down;
+   uint16_t _event_flags;
    km_core_state *state;
 
    // our in-flight action struct.
@@ -194,12 +194,12 @@ public:
 // implementation
 km_core_virtual_key
 ldml_event_state::get_vk() const {
-  return vk;
+  return _vk;
 }
 
 uint16_t
 ldml_event_state::get_modifier_state() const {
-  return modifier_state;
+  return _modifier_state;
 }
 
 } // namespace core