diff --git a/private/compile/compile.go b/private/compile/compile.go
index 8d0da4ce4..303755ab0 100644
--- a/private/compile/compile.go
+++ b/private/compile/compile.go
@@ -18,6 +18,8 @@ import (
 	"go.uber.org/zap"
 )
 
+type Index = index.Index
+
 type Artefact struct {
 	Error      error
 	PolicySet  *runtimev1.RunnablePolicySet
@@ -39,7 +41,7 @@ func (e *Errors) Error() string {
 	}
 }
 
-func Files(ctx context.Context, fsys fs.FS) (index.Index, <-chan Artefact, error) {
+func Files(ctx context.Context, fsys fs.FS) (Index, <-chan Artefact, error) {
 	idx, err := index.Build(ctx, fsys)
 	if err != nil {
 		idxErrs := new(index.BuildError)
diff --git a/private/verify/verify.go b/private/verify/verify.go
index 55bac1db0..bc4d676d8 100644
--- a/private/verify/verify.go
+++ b/private/verify/verify.go
@@ -26,7 +26,7 @@ import (
 )
 
 // Files runs tests using the policy files in the given file system.
-func Files(ctx context.Context, fsys fs.FS, idx index.Index) (*policyv1.TestResults, error) {
+func Files(ctx context.Context, fsys fs.FS, idx compile.Index) (*policyv1.TestResults, error) {
 	if idx == nil {
 		var err error
 		idx, err = index.Build(ctx, fsys, index.WithBuildFailureLogLevel(zap.DebugLevel))