diff --git a/controllers/helmchart_controller.go b/controllers/helmchart_controller.go
index 4a49fef6..ecf47500 100644
--- a/controllers/helmchart_controller.go
+++ b/controllers/helmchart_controller.go
@@ -21,6 +21,7 @@ import (
 	"crypto/tls"
 	"errors"
 	"fmt"
+	"github.com/fluxcd/pkg/git"
 	"net/url"
 	"os"
 	"path/filepath"
@@ -789,10 +790,10 @@ func (r *HelmChartReconciler) buildFromTarballArtifact(ctx context.Context, obj
 	if obj.Spec.ReconcileStrategy == sourcev1.ReconcileStrategyRevision {
 		rev := source.Revision
 		if obj.Spec.SourceRef.Kind == sourcev1.GitRepositoryKind {
-			// Split the reference by the `/` delimiter which may be present,
-			// and take the last entry which contains the SHA.
-			split := strings.Split(source.Revision, "/")
-			rev = split[len(split)-1]
+			rev = git.ExtractHashFromRevision(rev).String()
+		}
+		if obj.Spec.SourceRef.Kind == sourcev1.BucketKind {
+			rev = backwardsCompatibleDigest(rev).Hex()
 		}
 		if kind := obj.Spec.SourceRef.Kind; kind == sourcev1.GitRepositoryKind || kind == sourcev1.BucketKind {
 			// The SemVer from the metadata is at times used in e.g. the label metadata for a resource
@@ -1243,9 +1244,10 @@ func (r *HelmChartReconciler) requestsForGitRepositoryChange(o client.Object) []
 		return nil
 	}
 
+	revision := git.TransformRevision(repo.GetArtifact().Revision)
 	var reqs []reconcile.Request
 	for _, i := range list.Items {
-		if i.Status.ObservedSourceArtifactRevision != repo.GetArtifact().Revision {
+		if git.TransformRevision(i.Status.ObservedSourceArtifactRevision) != revision {
 			reqs = append(reqs, reconcile.Request{NamespacedName: client.ObjectKeyFromObject(&i)})
 		}
 	}
@@ -1270,9 +1272,10 @@ func (r *HelmChartReconciler) requestsForBucketChange(o client.Object) []reconci
 		return nil
 	}
 
+	revision := backwardsCompatibleDigest(bucket.GetArtifact().Revision)
 	var reqs []reconcile.Request
 	for _, i := range list.Items {
-		if i.Status.ObservedSourceArtifactRevision != bucket.GetArtifact().Revision {
+		if backwardsCompatibleDigest(i.Status.ObservedSourceArtifactRevision) != revision {
 			reqs = append(reqs, reconcile.Request{NamespacedName: client.ObjectKeyFromObject(&i)})
 		}
 	}
diff --git a/controllers/helmchart_controller_test.go b/controllers/helmchart_controller_test.go
index 98e2b82a..a7460e8c 100644
--- a/controllers/helmchart_controller_test.go
+++ b/controllers/helmchart_controller_test.go
@@ -1394,6 +1394,9 @@ func TestHelmChartReconciler_buildFromTarballArtifact(t *testing.T) {
 			}
 
 			got, err := r.buildFromTarballArtifact(context.TODO(), obj, tt.source, &b)
+			if err != nil {
+				t.Log(err)
+			}
 			g.Expect(err != nil).To(Equal(tt.wantErr != nil))
 			if tt.wantErr != nil {
 				g.Expect(reflect.TypeOf(err).String()).To(Equal(reflect.TypeOf(tt.wantErr).String()))