diff --git a/Sources/OpenGraph_SPI/Attribute/OGChangedValueFlags.h b/Sources/OpenGraph_SPI/Attribute/OGChangedValueFlags.h
index 905856c6..6fd84b40 100644
--- a/Sources/OpenGraph_SPI/Attribute/OGChangedValueFlags.h
+++ b/Sources/OpenGraph_SPI/Attribute/OGChangedValueFlags.h
@@ -11,8 +11,8 @@
 #include "OGBase.h"
 
 typedef OG_OPTIONS(uint32_t, OGChangedValueFlags) {
-    OGChangedValueFlags_0 = 0,
     OGChangedValueFlags_1 = 1 << 0,
+    OGChangedValueFlagsRequiresMainThread = 1 << 1,
 };
 
 #endif /* OGChangedValueFlags_h */