--- a/ThirdParty/freetype/vtk_freetype.h.in
+++ b/ThirdParty/freetype/vtk_freetype.h.in
@@ -20,6 +20,15 @@

 #ifdef VTK_USE_SYSTEM_FREETYPE
 # include <ft2build.h>
+/* FT_CALLBACK_DEF no longer exported since freetype-2.10.3 */
+/* has been moved to <freetype/internal/compiler-macros.h> */
+# ifndef FT_CALLBACK_DEF
+#  ifdef __cplusplus
+#   define FT_CALLBACK_DEF( x )  extern "C"  x
+#  else
+#   define FT_CALLBACK_DEF( x )  static  x
+#  endif
+# endif /* FT_CALLBACK_DEF */
 #else
 # include <vtkfreetype/include/ft2build.h>
 #endif