diff --git a/native/src/defines.h b/native/src/defines.h
index 48f92d8..ce3f85a 100644
--- a/native/src/defines.h
+++ b/native/src/defines.h
@@ -172,6 +172,7 @@
 #define EQUIVALENT_CHAR_WITHOUT_DISTANCE_INFO -2
 #define PROXIMITY_CHAR_WITHOUT_DISTANCE_INFO -3
 #define NOT_A_INDEX -1
+#define NOT_A_FREQUENCY -1
 
 #define KEYCODE_SPACE ' '