diff --git a/node-api/src/main/kotlin/net/corda/nodeapi/internal/config/CertificateStore.kt b/node-api/src/main/kotlin/net/corda/nodeapi/internal/config/CertificateStore.kt
index 8b02671153..e946c9a07c 100644
--- a/node-api/src/main/kotlin/net/corda/nodeapi/internal/config/CertificateStore.kt
+++ b/node-api/src/main/kotlin/net/corda/nodeapi/internal/config/CertificateStore.kt
@@ -45,7 +45,7 @@ interface CertificateStore : Iterable<Pair<String, X509Certificate>> {
 
     operator fun set(alias: String, certificate: X509Certificate) {
         update {
-            internal.addOrReplaceCertificate(X509Utilities.CORDA_ROOT_CA, certificate)
+            internal.addOrReplaceCertificate(alias, certificate)
         }
     }