diff --git a/native/src/defines.h b/native/src/defines.h
index c1d08e6..a29fb7e 100644
--- a/native/src/defines.h
+++ b/native/src/defines.h
@@ -177,6 +177,8 @@
 #define FULL_MATCHED_WORDS_PROMOTION_RATE 120
 #define WORDS_WITH_PROXIMITY_CHARACTER_DEMOTION_RATE 90
 #define WORDS_WITH_MATCH_SKIP_PROMOTION_RATE 105
+#define WORDS_WITH_JUST_ONE_CORRECTION_PROMOTION_RATE 160
+#define CORRECTION_COUNT_RATE_DEMOTION_RATE_BASE 42
 
 // This should be greater than or equal to MAX_WORD_LENGTH defined in BinaryDictionary.java
 // This is only used for the size of array. Not to be used in c functions.
@@ -194,5 +196,6 @@
 #define MIN_USER_TYPED_LENGTH_FOR_EXCESSIVE_CHARACTER_SUGGESTION 3
 
 #define min(a,b) ((a)<(b)?(a):(b))
+#define max(a,b) ((a)>(b)?(a):(b))
 
 #endif // LATINIME_DEFINES_H