diff --git a/lang/cpp/src/context.cpp b/lang/cpp/src/context.cpp
index aab22cdb..1e4e5490 100644
--- a/lang/cpp/src/context.cpp
+++ b/lang/cpp/src/context.cpp
@@ -1028,6 +1028,9 @@ unsigned int to_auditlog_flags(unsigned int flags)
     if (flags & Context::AuditLogWithHelp) {
         result |= GPGME_AUDITLOG_WITH_HELP;
     }
+    if (flags & Context::DiagnosticAuditLog) {
+        result |= GPGME_AUDITLOG_DIAG;
+    }
     return result;
 }
 
diff --git a/lang/cpp/src/context.h b/lang/cpp/src/context.h
index a14625e0..6e27daa6 100644
--- a/lang/cpp/src/context.h
+++ b/lang/cpp/src/context.h
@@ -401,7 +401,9 @@ public:
     //
     //
     enum AuditLogFlags {
+        DefaultAuditLog = 0,
         HtmlAuditLog = 1,
+        DiagnosticAuditLog = 2,
         AuditLogWithHelp = 128
     };
     GpgME::Error startGetAuditLog(Data &output, unsigned int flags = 0);