diff --git a/include/constants/vars.h b/include/constants/vars.h
index 3bd5d8efe7..72b02ee8f8 100644
--- a/include/constants/vars.h
+++ b/include/constants/vars.h
@@ -1,7 +1,7 @@
 #ifndef GUARD_CONSTANTS_VARS_H
 #define GUARD_CONSTANTS_VARS_H
 
-#define VAR_0x3F20                 0x3F20
+#define UNKNOWN_VAR_OFFSET_3F20 0x3F20
 
 #define VARS_START 0x4000
 
diff --git a/src/decoration.c b/src/decoration.c
index 2ac49b98c1..1635528d9b 100644
--- a/src/decoration.c
+++ b/src/decoration.c
@@ -1254,7 +1254,7 @@ void sub_8127E18(void)
                     break;
                 }
             }
-            VarSet(VAR_0x3F20 + gMapHeader.events->eventObjects[j].graphicsId, sPlaceDecorationGraphicsDataBuffer.decoration->tiles[0]);
+            VarSet(UNKNOWN_VAR_OFFSET_3F20 + gMapHeader.events->eventObjects[j].graphicsId, sPlaceDecorationGraphicsDataBuffer.decoration->tiles[0]);
             gSpecialVar_0x8005 = gMapHeader.events->eventObjects[j].localId;
             gSpecialVar_0x8006 = sCurDecorMapX;
             gSpecialVar_0x8007 = sCurDecorMapY;
diff --git a/src/secret_base.c b/src/secret_base.c
index 02d627722b..cf35deb072 100644
--- a/src/secret_base.c
+++ b/src/secret_base.c
@@ -552,7 +552,7 @@ void sub_80E933C(void)
                 metatile = MapGridGetMetatileBehaviorAt(gSpecialVar_0x8006 + 7, gSpecialVar_0x8007 + 7);
                 if (MetatileBehavior_IsSecretBaseLargeMatEdge(metatile) == TRUE || MetatileBehavior_IsLargeMatCenter(metatile) == TRUE)
                 {
-                    gSpecialVar_Result = gMapHeader.events->eventObjects[objIdx].graphicsId + VAR_0x3F20;
+                    gSpecialVar_Result = gMapHeader.events->eventObjects[objIdx].graphicsId + UNKNOWN_VAR_OFFSET_3F20;
                     VarSet(gSpecialVar_Result, gDecorations[roomDecor[decorIdx]].tiles[0]);
                     gSpecialVar_Result = gMapHeader.events->eventObjects[objIdx].localId;
                     FlagClear(gSpecialVar_0x8004 + 0xAE);