diff --git a/common/js/types.d.ts b/common/js/types.d.ts
index ce2c4afa5..eca82949e 100644
--- a/common/js/types.d.ts
+++ b/common/js/types.d.ts
@@ -827,7 +827,7 @@ interface BASE_VALID_HIT_META {
 declare type IIDXHitMeta = BASE_VALID_HIT_META & {
     bp: integer | null;
     gauge: number | null;
-    gaugeHistory: number[] | null;
+    gaugeHistory: (number | null)[] | null;
     comboBreak: integer | null;
 };
 declare type BMSJudgePermutations = `${"e" | "l"}${"bd" | "pr" | "gd" | "gr" | "pg"}`;
diff --git a/common/src/types.ts b/common/src/types.ts
index ad9641d7c..b991ad9e3 100644
--- a/common/src/types.ts
+++ b/common/src/types.ts
@@ -1044,7 +1044,7 @@ interface BASE_VALID_HIT_META {
 type IIDXHitMeta = BASE_VALID_HIT_META & {
     bp: integer | null;
     gauge: number | null;
-    gaugeHistory: number[] | null;
+    gaugeHistory: (number | null)[] | null;
     comboBreak: integer | null;
 };