--- a/Core/DicomNetworking/IDicomConnectionManager.h	Tue May 29 09:12:33 2018 +0200
+++ b/Core/DicomNetworking/IDicomConnectionManager.h	Wed May 30 10:50:57 2018 +0200
@@ -33,6 +33,26 @@
 
 #pragma once
 
+#if !defined(ORTHANC_ENABLE_DCMTK_NETWORKING)
+#  error The macro ORTHANC_ENABLE_DCMTK_NETWORKING must be defined
+#endif
+
+#if ORTHANC_ENABLE_DCMTK_NETWORKING == 0
+
+namespace Orthanc
+{
+  // DICOM networking is disabled, this is just a void class
+  class IDicomConnectionManager : public boost::noncopyable
+  {
+  public:
+    virtual ~IDicomConnectionManager()
+    {
+    }
+  };
+}
+
+#else
+
 #include "DicomUserConnection.h"
 
 namespace Orthanc
@@ -58,3 +78,5 @@
                                          const RemoteModalityParameters& remote) = 0;
   };
 }
+
+#endif

--- a/Core/DicomNetworking/TimeoutDicomConnectionManager.h	Tue May 29 09:12:33 2018 +0200
+++ b/Core/DicomNetworking/TimeoutDicomConnectionManager.h	Wed May 30 10:50:57 2018 +0200
@@ -35,6 +35,34 @@
 
 #include "IDicomConnectionManager.h"
 
+#if ORTHANC_ENABLE_DCMTK_NETWORKING == 0
+
+namespace Orthanc
+{
+  class TimeoutDicomConnectionManager : public IDicomConnectionManager
+  {
+  public:
+    void SetTimeout(unsigned int timeout)
+    {
+    }
+
+    unsigned int GetTimeout()
+    {
+      return 0;
+    }
+
+    void Close()
+    {
+    }
+
+    void CheckTimeout()
+    {
+    }
+  };
+}
+
+#else
+
 #include <boost/date_time/posix_time/posix_time.hpp>
 
 namespace Orthanc
@@ -70,3 +98,5 @@
                                          const RemoteModalityParameters& remote);
   };
 }
+
+#endif