diff --git a/ZcashLightClientKit/Block/Processor/CompactBlockProcessor.swift b/ZcashLightClientKit/Block/Processor/CompactBlockProcessor.swift
index 2826c9ad..f7faf6b4 100644
--- a/ZcashLightClientKit/Block/Processor/CompactBlockProcessor.swift
+++ b/ZcashLightClientKit/Block/Processor/CompactBlockProcessor.swift
@@ -344,7 +344,7 @@ public class CompactBlockProcessor {
     
     func determineLowerBound(errorHeight: Int, consecutiveErrors: Int, walletBirthday: BlockHeight) -> BlockHeight {
             let offset = min(ZcashSDK.MAX_REORG_SIZE, ZcashSDK.DEFAULT_REWIND_DISTANCE * (consecutiveErrors + 1))
-            return max(errorHeight - offset, walletBirthday)
+            return max(errorHeight - offset, walletBirthday - ZcashSDK.MAX_REORG_SIZE)
     }
         
     private func processBatchFinished(range: CompactBlockRange) {
diff --git a/ZcashLightClientKitTests/CompactBlockProcessorTests.swift b/ZcashLightClientKitTests/CompactBlockProcessorTests.swift
index a7d8bb4f..4c8ee5b1 100644
--- a/ZcashLightClientKitTests/CompactBlockProcessorTests.swift
+++ b/ZcashLightClientKitTests/CompactBlockProcessorTests.swift
@@ -141,7 +141,7 @@ class CompactBlockProcessorTests: XCTestCase {
         let walletBirthday = 781_900
         
         let result = processor.determineLowerBound(errorHeight: errorHeight, consecutiveErrors: 1, walletBirthday: walletBirthday)
-        let expected = 781_900
+        let expected = 781_886
         
         XCTAssertEqual(result, expected)