diff --git a/experimental/packages/sdk-logs/src/export/BatchLogRecordProcessorBase.ts b/experimental/packages/sdk-logs/src/export/BatchLogRecordProcessorBase.ts
index 18f4eb3fa9e..178c4f135f7 100644
--- a/experimental/packages/sdk-logs/src/export/BatchLogRecordProcessorBase.ts
+++ b/experimental/packages/sdk-logs/src/export/BatchLogRecordProcessorBase.ts
@@ -40,7 +40,7 @@ export abstract class BatchLogRecordProcessorBase<T extends BufferConfig>
   private readonly _exportTimeoutMillis: number;
 
   private _finishedLogRecords: LogRecord[] = [];
-  private _timer: number | undefined;
+  private _timer: NodeJS.Timeout | undefined;
   private _shutdownOnce: BindOnceFuture<void>;
 
   constructor(
@@ -106,7 +106,7 @@ export abstract class BatchLogRecordProcessorBase<T extends BufferConfig>
    * */
   private _flushAll(): Promise<void> {
     return new Promise((resolve, reject) => {
-      const promises = [];
+      const promises: Promise<void>[] = [];
       const batchCount = Math.ceil(
         this._finishedLogRecords.length / this._maxExportBatchSize
       );
diff --git a/packages/opentelemetry-sdk-trace-base/src/export/BatchSpanProcessorBase.ts b/packages/opentelemetry-sdk-trace-base/src/export/BatchSpanProcessorBase.ts
index 1d5173f898e..7e02842bb0e 100644
--- a/packages/opentelemetry-sdk-trace-base/src/export/BatchSpanProcessorBase.ts
+++ b/packages/opentelemetry-sdk-trace-base/src/export/BatchSpanProcessorBase.ts
@@ -43,7 +43,7 @@ export abstract class BatchSpanProcessorBase<T extends BufferConfig>
 
   private _isExporting = false;
   private _finishedSpans: ReadableSpan[] = [];
-  private _timer: number | undefined;
+  private _timer: NodeJS.Timeout | undefined;
   private _shutdownOnce: BindOnceFuture<void>;
   private _droppedSpansCount: number = 0;