diff --git a/pgpainless-core/src/main/kotlin/org/pgpainless/key/SubkeyIdentifier.kt b/pgpainless-core/src/main/kotlin/org/pgpainless/key/SubkeyIdentifier.kt
index cda7eccd..a793fc99 100644
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/key/SubkeyIdentifier.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/key/SubkeyIdentifier.kt
@@ -31,7 +31,7 @@ class SubkeyIdentifier(
     val subkeyId = subkeyFingerprint.keyId
     val primaryKeyId = primaryKeyFingerprint.keyId
 
-    val isPrimaryKey = keyId == subkeyId
+    val isPrimaryKey = primaryKeyId == subkeyId
 
     fun matches(fingerprint: OpenPgpFingerprint) =
             primaryKeyFingerprint == fingerprint || subkeyFingerprint == fingerprint