diff --git a/apex/apex.go b/apex/apex.go
index 949d80e..7ceb00b 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -2097,6 +2097,11 @@
 		}
 	}
 
+	// Add classpaths.proto config.
+	classpathProtoOutput := bootclasspathFragmentInfo.ClasspathFragmentProtoOutput
+	classpathProto := newApexFile(ctx, classpathProtoOutput, classpathProtoOutput.Base(), bootclasspathFragmentInfo.ClasspathFragmentProtoInstallDir.Rel(), etc, nil)
+	filesToAdd = append(filesToAdd, classpathProto)
+
 	return filesToAdd
 }