diff --git a/src/provider.cpp b/src/provider.cpp
--- a/src/provider.cpp
+++ b/src/provider.cpp
@@ -81,6 +81,7 @@
 #include "topicparser.h"
 #include "itemjob.h"
 #include "listjob.h"
+#include "version.h"
 
 #include <QStringList>
 #include <QNetworkAccessManager>
@@ -1631,7 +1632,7 @@
     if (QCoreApplication::instance()) {
         agentHeader = QString::fromLocal8Bit("%1/%2").arg(QCoreApplication::instance()->applicationName(), QCoreApplication::instance()->applicationVersion());
     } else {
-        agentHeader = QString::fromLocal8Bit("Attica/%1").arg(QCoreApplication::instance()->applicationVersion());
+        agentHeader = QString::fromLocal8Bit("Attica/%1").arg(QLatin1String(LIBATTICA_VERSION_STRING));
     }
     if (!d->m_additionalAgentInformation.isEmpty()) {
         agentHeader = QString::fromLocal8Bit("%1 (+%2)").arg(agentHeader, d->m_additionalAgentInformation);
diff --git a/src/version.h.cmake b/src/version.h.cmake
--- a/src/version.h.cmake
+++ b/src/version.h.cmake
@@ -24,16 +24,16 @@
 #include "attica_export.h"
 
 /// @brief Attica version as string at compile time.
-#define LIBATTICA_VERSION_STRING "${CMAKE_LIBATTICA_VERSION_STRING}"
+#define LIBATTICA_VERSION_STRING "${ATTICA_VERSION_STRING}"
 
 /// @brief The major Attica version number at compile time
-#define LIBATTICA_VERSION_MAJOR ${CMAKE_LIBATTICA_VERSION_MAJOR}
+#define LIBATTICA_VERSION_MAJOR ${ATTICA_VERSION_MAJOR}
 
 /// @brief The minor Attica version number at compile time
-#define LIBATTICA_VERSION_MINOR ${CMAKE_LIBATTICA_VERSION_MINOR}
+#define LIBATTICA_VERSION_MINOR ${ATTICA_VERSION_MINOR}
 
 /// @brief The Attica release version number at compile time
-#define LIBATTICA_VERSION_RELEASE ${CMAKE_LIBATTICA_VERSION_PATCH}
+#define LIBATTICA_VERSION_RELEASE ${ATTICA_VERSION_PATCH}
 
 /**
  * \brief Create a unique number from the major, minor and release number of a %Attica version