diff --git a/java-fast/io/nayuki/fastqrcodegen/Memoizer.java b/java-fast/io/nayuki/fastqrcodegen/Memoizer.java
index 4cf9cc9..c56c5dc 100644
--- a/java-fast/io/nayuki/fastqrcodegen/Memoizer.java
+++ b/java-fast/io/nayuki/fastqrcodegen/Memoizer.java
@@ -83,6 +83,7 @@ final class Memoizer<T,R> {
 				try {
 					this.wait();
 				} catch (InterruptedException e) {
+					Thread.currentThread().interrupt();
 					throw new RuntimeException(e);
 				}
 			}