diff --git a/client/client_export_metadata_test.go b/client/client_export_metadata_test.go
index 1e77d7dc7325..4251103af4f2 100644
--- a/client/client_export_metadata_test.go
+++ b/client/client_export_metadata_test.go
@@ -426,13 +426,13 @@ func testExportAnnotations(t *testing.T, sb integration.Sandbox) {
 					"name":                 target,
 					"push":                 "true",
 					"annotation-index.gio": "generic index opt",
-					"annotation-index." + ocispecs.AnnotationCreated:  created,
-					"annotation-manifest.gmo":                         "generic manifest opt",
-					"annotation-manifest-descriptor.gmdo":             "generic manifest descriptor opt",
-					"annotation-manifest[linux/amd64].mo":             "amd64 manifest opt",
-					"annotation-manifest-descriptor[linux/amd64].mdo": "amd64 manifest descriptor opt",
-					"annotation-manifest[linux/arm64].mo":             "arm64 manifest opt",
-					"annotation-manifest-descriptor[linux/arm64].mdo": "arm64 manifest descriptor opt",
+					"annotation-index." + ocispecs.AnnotationCreated:     created,
+					"annotation-manifest.gmo":                            "generic manifest opt",
+					"annotation-manifest-descriptor.gmdo":                "generic manifest descriptor opt",
+					"annotation-manifest[linux/amd64].mo":                "amd64 manifest opt",
+					"annotation-manifest-descriptor[linux/amd64].mdo":    "amd64 manifest descriptor opt",
+					"annotation-manifest[linux/arm64/v8].mo":             "arm64 manifest opt",
+					"annotation-manifest-descriptor[linux/arm64/v8].mdo": "arm64 manifest descriptor opt",
 				},
 			},
 		},
@@ -498,8 +498,8 @@ func testExportAnnotations(t *testing.T, sb integration.Sandbox) {
 					"annotation-manifest-descriptor.gmdo":                       "generic manifest descriptor opt",
 					"annotation-manifest[linux/amd64].mo":                       "amd64 manifest opt",
 					"annotation-manifest-descriptor[linux/amd64].mdo":           "amd64 manifest descriptor opt",
-					"annotation-manifest[linux/arm64].mo":                       "arm64 manifest opt",
-					"annotation-manifest-descriptor[linux/arm64].mdo":           "arm64 manifest descriptor opt",
+					"annotation-manifest[linux/arm64/v8].mo":                    "arm64 manifest opt",
+					"annotation-manifest-descriptor[linux/arm64/v8].mdo":        "arm64 manifest descriptor opt",
 				},
 			},
 		},
diff --git a/exporter/containerimage/exptypes/annotations.go b/exporter/containerimage/exptypes/annotations.go
index a9b74d6b9681..6b77014ccdef 100644
--- a/exporter/containerimage/exptypes/annotations.go
+++ b/exporter/containerimage/exptypes/annotations.go
@@ -103,6 +103,7 @@ func ParseAnnotationKey(result string) (AnnotationKey, bool, error) {
 		if err != nil {
 			return AnnotationKey{}, true, err
 		}
+		p = platforms.Normalize(p)
 		ociPlatform = &p
 	}
 
diff --git a/exporter/containerimage/exptypes/annotations_test.go b/exporter/containerimage/exptypes/annotations_test.go
new file mode 100644
index 000000000000..0f2f260b61bd
--- /dev/null
+++ b/exporter/containerimage/exptypes/annotations_test.go
@@ -0,0 +1,32 @@
+package exptypes
+
+import (
+	"testing"
+
+	ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseAnnotationKeyPlatform(t *testing.T) {
+	for _, tc := range []struct {
+		platform string
+		want     ocispecs.Platform
+	}{
+		{"linux/arm64", ocispecs.Platform{OS: "linux", Architecture: "arm64"}},
+		{"linux/arm64/v8", ocispecs.Platform{OS: "linux", Architecture: "arm64"}},
+		{"linux/arm64/8", ocispecs.Platform{OS: "linux", Architecture: "arm64"}},
+		{"linux/arm64/v9", ocispecs.Platform{OS: "linux", Architecture: "arm64", Variant: "v9"}},
+		{"linux/arm", ocispecs.Platform{OS: "linux", Architecture: "arm", Variant: "v7"}},
+		{"linux/arm/v6", ocispecs.Platform{OS: "linux", Architecture: "arm", Variant: "v6"}},
+		{"linux/arm/v7", ocispecs.Platform{OS: "linux", Architecture: "arm", Variant: "v7"}},
+	} {
+		for _, typ := range []string{AnnotationManifest, AnnotationManifestDescriptor} {
+			t.Run(typ+"/"+tc.platform, func(t *testing.T) {
+				key, ok, err := ParseAnnotationKey("annotation-" + typ + "[" + tc.platform + "].example")
+				require.NoError(t, err)
+				require.True(t, ok)
+				require.Equal(t, AnnotationKey{Type: typ, Platform: &tc.want, Key: "example"}, key)
+			})
+		}
+	}
+}