Index: gegl-0.4.30/operations/external/exr-save.cc
===================================================================
--- gegl-0.4.30.orig/operations/external/exr-save.cc
+++ gegl-0.4.30/operations/external/exr-save.cc
@@ -39,6 +39,7 @@ extern "C" {
 } /* extern "C" */
 
 #include <exception>
+#include <ImfFrameBuffer.h>
 #include <ImfTiledOutputFile.h>
 #include <ImfOutputFile.h>
 #include <ImfChannelList.h>