diff --git a/include/constants/flags.h b/include/constants/flags.h
index c17383b2f4..5082014e7b 100644
--- a/include/constants/flags.h
+++ b/include/constants/flags.h
@@ -36,8 +36,8 @@
 #define FLAG_TEMP_1D    0x1D
 #define FLAG_TEMP_1E    0x1E
 #define FLAG_TEMP_1F    0x1F
-#define FLAG_TEMP_20    0x20 // Unused Flag
 
+#define FLAG_UNUSED_0x020    0x20 // Unused Flag
 #define FLAG_UNUSED_0x021    0x21 // Unused Flag
 #define FLAG_UNUSED_0x022    0x22 // Unused Flag
 #define FLAG_UNUSED_0x023    0x23 // Unused Flag