diff --git a/modules/detection/include/visp3/detection/vpDetectorAprilTag.h b/modules/detection/include/visp3/detection/vpDetectorAprilTag.h
index 7966d9abf5..929c6563be 100644
--- a/modules/detection/include/visp3/detection/vpDetectorAprilTag.h
+++ b/modules/detection/include/visp3/detection/vpDetectorAprilTag.h
@@ -51,7 +51,7 @@ class vpDetectorAprilTag;
 END_VISP_NAMESPACE
 
 // Forward declaration to have the operator in the global namespace
-void swap(VISP_NAMESPACE_ADDRESSING vpDetectorAprilTag &o1, VISP_NAMESPACE_ADDRESSING vpDetectorAprilTag &o2);
+VISP_EXPORT void swap(VISP_NAMESPACE_ADDRESSING vpDetectorAprilTag &o1, VISP_NAMESPACE_ADDRESSING vpDetectorAprilTag &o2);
 
 BEGIN_VISP_NAMESPACE
 /*!
@@ -221,7 +221,7 @@ BEGIN_VISP_NAMESPACE
  * Other examples are also provided in tutorial-apriltag-detector.cpp and
  * tutorial-apriltag-detector-live.cpp
  */
-class VISP_EXPORT vpDetectorAprilTag : public vpDetectorBase
+  class VISP_EXPORT vpDetectorAprilTag : public vpDetectorBase
 {
 public:
   enum vpAprilTagFamily
@@ -308,7 +308,7 @@ class VISP_EXPORT vpDetectorAprilTag : public vpDetectorBase
     m_displayTagThickness = thickness;
   }
 
-  friend void ::swap(vpDetectorAprilTag &o1, vpDetectorAprilTag &o2);
+  VISP_EXPORT friend void ::swap(vpDetectorAprilTag &o1, vpDetectorAprilTag &o2);
 
   void setZAlignedWithCameraAxis(bool zAlignedWithCameraFrame);
 
diff --git a/modules/detection/src/tag/vpDetectorAprilTag.cpp b/modules/detection/src/tag/vpDetectorAprilTag.cpp
index b8fb6d302a..08581ad5de 100644
--- a/modules/detection/src/tag/vpDetectorAprilTag.cpp
+++ b/modules/detection/src/tag/vpDetectorAprilTag.cpp
@@ -1200,7 +1200,7 @@ void vpDetectorAprilTag::setZAlignedWithCameraAxis(bool zAlignedWithCameraFrame)
 
 END_VISP_NAMESPACE
 
-void swap(VISP_NAMESPACE_ADDRESSING vpDetectorAprilTag &o1, VISP_NAMESPACE_ADDRESSING vpDetectorAprilTag &o2)
+VISP_EXPORT void swap(VISP_NAMESPACE_ADDRESSING vpDetectorAprilTag &o1, VISP_NAMESPACE_ADDRESSING vpDetectorAprilTag &o2)
 {
   using std::swap;