diff --git a/app/widgets/gimphistogrambox.c b/app/widgets/gimphistogrambox.c
index e090cae6f5..8273f4e000 100644
--- a/app/widgets/gimphistogrambox.c
+++ b/app/widgets/gimphistogrambox.c
@@ -19,6 +19,7 @@
 
 #include <string.h>
 
+#include <gegl.h>
 #include <gtk/gtk.h>
 
 #include "libgimpmath/gimpmath.h"
diff --git a/app/widgets/gimphistogramview.c b/app/widgets/gimphistogramview.c
index 700594e177..2bfd6546d0 100644
--- a/app/widgets/gimphistogramview.c
+++ b/app/widgets/gimphistogramview.c
@@ -17,6 +17,7 @@
 
 #include "config.h"
 
+#include <gegl.h>
 #include <gtk/gtk.h>
 
 #include "libgimpmath/gimpmath.h"