diff --git a/src/Library/IPCClientPrivate.hpp b/src/Library/IPCClientPrivate.hpp
index 728c282..9f2f0f3 100644
--- a/src/Library/IPCClientPrivate.hpp
+++ b/src/Library/IPCClientPrivate.hpp
@@ -33,6 +33,7 @@

 #include <qb/qbipcc.h>
 #include <qb/qbloop.h>
+#include <qb/qbhdb.h>

 namespace usbguard {
   class IPCClientPrivate
diff --git a/src/Library/IPCServerPrivate.hpp b/src/Library/IPCServerPrivate.hpp
index 1f93cb1..8774bbc 100644
--- a/src/Library/IPCServerPrivate.hpp
+++ b/src/Library/IPCServerPrivate.hpp
@@ -29,6 +29,7 @@

 #include <qb/qbipcs.h>
 #include <qb/qbloop.h>
+#include <qb/qbhdb.h>

 #include "Devices.pb.h"
 #include "Policy.pb.h"