diff --git a/libguh/coap/coapobserveresource.h b/libguh/coap/coapobserveresource.h
index 49e0584a..6677563b 100644
--- a/libguh/coap/coapobserveresource.h
+++ b/libguh/coap/coapobserveresource.h
@@ -25,9 +25,10 @@
 #include <QHash>
 #include <QUrl>
 
+#include "libguh.h"
+
 class LIBGUH_EXPORT CoapObserveResource
 {
-
 public:
     CoapObserveResource();
     CoapObserveResource(const QUrl &url, const QByteArray &token);