diff --git a/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala b/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala
index 7702e6a93446..eeeb3767bd34 100644
--- a/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala
+++ b/compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala
@@ -1086,10 +1086,10 @@ class ClassfileParser(
           if (sym == classRoot.symbol)
             staticScope.lookup(name)
           else {
-            var module = sym.companionModule
-            if (!module.exists && sym.isAbsent())
-              module = sym.scalacLinkedClass
-            module.info.member(name).symbol
+            var moduleClass = sym.registeredCompanion
+            if (!moduleClass.exists && sym.isAbsent())
+              moduleClass = sym.scalacLinkedClass
+            moduleClass.info.member(name).symbol
           }
         else if (sym == classRoot.symbol)
           instanceScope.lookup(name)
diff --git a/sbt-test/java-compat/i15288/QueryRequest.java b/sbt-test/java-compat/i15288/QueryRequest.java
new file mode 100644
index 000000000000..e43487e09449
--- /dev/null
+++ b/sbt-test/java-compat/i15288/QueryRequest.java
@@ -0,0 +1,9 @@
+interface CopyableBuilder<B, T> {}
+interface ToCopyableBuilder<B, T> {}
+
+public class QueryRequest implements ToCopyableBuilder<QueryRequest.Builder, QueryRequest> {
+    public static Builder builder() { throw new UnsupportedOperationException(); }
+    public interface Builder extends CopyableBuilder<Builder, QueryRequest> {
+        void build();
+    }
+}
diff --git a/sbt-test/java-compat/i15288/Test.scala b/sbt-test/java-compat/i15288/Test.scala
new file mode 100644
index 000000000000..e03617ac4c33
--- /dev/null
+++ b/sbt-test/java-compat/i15288/Test.scala
@@ -0,0 +1,2 @@
+class Test:
+  def makeQuery = QueryRequest.builder().build()
diff --git a/sbt-test/java-compat/i15288/build.sbt b/sbt-test/java-compat/i15288/build.sbt
new file mode 100644
index 000000000000..63e314982c41
--- /dev/null
+++ b/sbt-test/java-compat/i15288/build.sbt
@@ -0,0 +1 @@
+scalaVersion := sys.props("plugin.scalaVersion")
diff --git a/sbt-test/java-compat/i15288/test b/sbt-test/java-compat/i15288/test
new file mode 100644
index 000000000000..ad1a8a5987ee
--- /dev/null
+++ b/sbt-test/java-compat/i15288/test
@@ -0,0 +1,5 @@
+## This could just be a pos test checked by FromTastyTests, but
+## ParallelTesting#compileTastyInDir does not support test with multiple files
+## currently.
+> compile
+> doc