diff --git a/src/crypto_public.c b/src/crypto_public.c
index 7a59da0..657263e 100644
--- a/src/crypto_public.c
+++ b/src/crypto_public.c
@@ -284,7 +284,6 @@ void apk_public_key_free(struct apk_public_key *pub)
 
 int apk_verify_digest_start(struct apk_digest_ctx *dctx, uint16_t signature_type)
 {
-	const uint8_t domain_seperator[5] = {'q', 't', 's', 'e', 'p'};
 	uint8_t digest;
 
 	switch (signature_type) {
@@ -306,12 +305,6 @@ int apk_verify_digest_start(struct apk_digest_ctx *dctx, uint16_t signature_type
 		return -APKE_CRYPTO_ERROR;
 	}
 
-	if (signature_type == APK_SIGNATURE_CUTE) {
-		if (apk_digest_ctx_update(dctx, domain_seperator, 5) != 0) {
-			return -APKE_CRYPTO_ERROR;
-		}
-	}
-
 	return 0;
 }
 
diff --git a/src/crypto_secret.c b/src/crypto_secret.c
index 869b950..dc09846 100644
--- a/src/crypto_secret.c
+++ b/src/crypto_secret.c
@@ -280,7 +280,6 @@ void apk_secret_key_free(struct apk_secret_key *sec)
 
 int apk_sign_digest_start(struct apk_digest_ctx *dctx, uint16_t signature_type)
 {
-	const uint8_t domain_seperator[5] = {'q', 't', 's', 'e', 'p'};
 	uint8_t digest;
 
 	switch (signature_type) {
@@ -302,12 +301,6 @@ int apk_sign_digest_start(struct apk_digest_ctx *dctx, uint16_t signature_type)
 		return -APKE_CRYPTO_ERROR;
 	}
 
-	if (signature_type == APK_SIGNATURE_CUTE) {
-		if (apk_digest_ctx_update(dctx, domain_seperator, 5) != 0) {
-			return -APKE_CRYPTO_ERROR;
-		}
-	}
-
 	return 0;
 }