diff --git a/native/jni/src/proximity_info_state.cpp b/native/jni/src/proximity_info_state.cpp
index 5cb9235..9b18918 100644
--- a/native/jni/src/proximity_info_state.cpp
+++ b/native/jni/src/proximity_info_state.cpp
@@ -25,6 +25,13 @@
 #include "proximity_info_state.h"
 
 namespace latinime {
+
+const int ProximityInfoState::NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR_LOG_2 = 10;
+const int ProximityInfoState::NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR =
+        1 << NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR_LOG_2;
+const float ProximityInfoState::NOT_A_DISTANCE_FLOAT = -1.0f;
+const int ProximityInfoState::NOT_A_CODE = -1;
+
 void ProximityInfoState::initInputParams(const int pointerId, const float maxPointToKeyLength,
         const ProximityInfo *proximityInfo, const int32_t *const inputCodes, const int inputSize,
         const int *const xCoordinates, const int *const yCoordinates, const int *const times,
diff --git a/native/jni/src/proximity_info_state.h b/native/jni/src/proximity_info_state.h
index 453b1de..48862a7 100644
--- a/native/jni/src/proximity_info_state.h
+++ b/native/jni/src/proximity_info_state.h
@@ -34,11 +34,10 @@
 class ProximityInfoState {
  public:
     typedef std::bitset<MAX_KEY_COUNT_IN_A_KEYBOARD> NearKeycodesSet;
-    static const int NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR_LOG_2 = 10;
-    static const int NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR =
-            1 << NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR_LOG_2;
-    static const float NOT_A_DISTANCE_FLOAT = -1.0f;
-    static const int NOT_A_CODE = -1;
+    static const int NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR_LOG_2;
+    static const int NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR;
+    static const float NOT_A_DISTANCE_FLOAT;
+    static const int NOT_A_CODE;
 
     /////////////////////////////////////////
     // Defined in proximity_info_state.cpp //