diff --git a/src/dk.gov.oiosi/security/revocation/ocsp/OcspLookup.cs b/src/dk.gov.oiosi/security/revocation/ocsp/OcspLookup.cs
index 8f46102b472418e06efc13d34091b2d3bb9f7807..51348d7055d487f2ac66fb999129b65d62c9fc64 100644
--- a/src/dk.gov.oiosi/security/revocation/ocsp/OcspLookup.cs
+++ b/src/dk.gov.oiosi/security/revocation/ocsp/OcspLookup.cs
@@ -862,7 +862,7 @@ namespace dk.gov.oiosi.security.revocation.ocsp {
             AsyncOcspCall asyncOcspCall = new AsyncOcspCall(this.RevocationResponse);
             IAsyncResult asyncResult = asyncOcspCall.BeginInvoke(certificate, null, null);
 
-            bool ocspRepliedInTime = asyncResult.AsyncWaitHandle.WaitOne(Utilities.TimeSpanInMilliseconds(TimeSpan.FromMilliseconds(_configuration.DefaultTimeoutMsec)), false);
+            bool ocspRepliedInTime = asyncResult.AsyncWaitHandle.WaitOne(_configuration.DefaultTimeoutMsec, true);
             if (ocspRepliedInTime)
             {
                 // okay, the operation has finish.