diff --git a/jsign-crypto/src/main/java/net/jsign/jca/JsignJcaProvider.java b/jsign-crypto/src/main/java/net/jsign/jca/JsignJcaProvider.java
index 0c3adfa3..3132a409 100644
--- a/jsign-crypto/src/main/java/net/jsign/jca/JsignJcaProvider.java
+++ b/jsign-crypto/src/main/java/net/jsign/jca/JsignJcaProvider.java
@@ -102,7 +102,12 @@ static class JsignJcaKeyStore extends AbstractKeyStoreSpi {
         public JsignJcaKeyStore(KeyStoreType type, String keystore) {
             builder.storetype(type);
             builder.keystore(keystore);
-            builder.certfile("");
+            String certfile = System.getProperty("jsign.certfile");
+            if (certfile == null) {
+                builder.certfile("");
+            } else {
+                builder.certfile(certfile);
+            }
         }
 
         private KeyStore getKeyStore() throws KeyStoreException {