diff --git a/rtengine/guidedfilter.h b/rtengine/guidedfilter.h
index d66396c6a..2d8b70369 100644
--- a/rtengine/guidedfilter.h
+++ b/rtengine/guidedfilter.h
@@ -20,11 +20,12 @@
 
 #pragma once
 
-#include "array2D.h"
+template<typename T> class array2D;
 
 namespace rtengine
 {
 
+
 void guidedFilter(const array2D<float> &guide, const array2D<float> &src, array2D<float> &dst, int r, float epsilon, bool multithread, int subsampling=0);
 
 } // namespace rtengine
diff --git a/rtengine/iplabregions.cc b/rtengine/iplabregions.cc
index 1768101c8..6526419f5 100644
--- a/rtengine/iplabregions.cc
+++ b/rtengine/iplabregions.cc
@@ -18,6 +18,7 @@
  *  along with RawTherapee.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+#include "array2D.h"
 #include "color.h"
 #include "curves.h"
 #include "guidedfilter.h"
diff --git a/rtengine/ipshadowshighlights.cc b/rtengine/ipshadowshighlights.cc
index a602c5460..5c5b6b324 100644
--- a/rtengine/ipshadowshighlights.cc
+++ b/rtengine/ipshadowshighlights.cc
@@ -20,6 +20,7 @@
 
 #include "improcfun.h"
 
+#include "array2D.h"
 #include "color.h"
 #include "curves.h"
 #include "gauss.h"
diff --git a/rtengine/pipettebuffer.h b/rtengine/pipettebuffer.h
index 79b6dd8c5..6f017a196 100644
--- a/rtengine/pipettebuffer.h
+++ b/rtengine/pipettebuffer.h
@@ -18,7 +18,6 @@
  */
 #pragma once
 
-#include "array2D.h"
 #include "iimage.h"
 
 class EditDataProvider;