diff --git a/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/KeyRingBuilder.kt b/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/KeyRingBuilder.kt
index f6ab303c..f6967bd6 100644
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/KeyRingBuilder.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/KeyRingBuilder.kt
@@ -90,7 +90,7 @@ class KeyRingBuilder : KeyRingBuilderInterface<KeyRingBuilder> {
         return KeyFlag.hasKeyFlag(flags.flags, KeyFlag.CERTIFY_OTHER)
     }
 
-    private fun keyIsCertificationCapable(keySpec: KeySpec) = keySpec.keyType.canCertify()
+    private fun keyIsCertificationCapable(keySpec: KeySpec) = keySpec.keyType.canCertify
 
     override fun build(): PGPSecretKeyRing {
         val keyFingerprintCalculator = ImplementationFactory.getInstance()