diff --git a/internal/zinc-classfile/src/main/java/sbt/internal/inc/zip/ZipCentralDir.java b/internal/zinc-classfile/src/main/java/sbt/internal/inc/zip/ZipCentralDir.java
index 20fe9e1c9..c0ca6d8aa 100644
--- a/internal/zinc-classfile/src/main/java/sbt/internal/inc/zip/ZipCentralDir.java
+++ b/internal/zinc-classfile/src/main/java/sbt/internal/inc/zip/ZipCentralDir.java
@@ -302,8 +302,8 @@ public int hashCode() {
         IndexNode child;  // 1st child
     }
 
-    private static void zerror(String msg) {
-        throw new ZipError(msg);
+    private static void zerror(String msg) throws ZipException {
+        throw new ZipException(msg);
     }
 
     private void buildNodeTree() {