diff --git a/app/operations/layer-modes/gimp-layer-modes.c b/app/operations/layer-modes/gimp-layer-modes.c
index 2ae01c7876..40f457b9f4 100644
--- a/app/operations/layer-modes/gimp-layer-modes.c
+++ b/app/operations/layer-modes/gimp-layer-modes.c
@@ -28,6 +28,19 @@
 #include "gimp-layer-modes.h"
 
 
+typedef struct _GimpLayerModeInfo GimpLayerModeInfo;
+
+struct _GimpLayerModeInfo
+{
+  GimpLayerMode          layer_mode;
+  gchar                 *op_name;
+  GimpLayerModeFlags     flags;
+  GimpLayerCompositeMode composite_mode;
+  GimpLayerColorSpace    composite_space;
+  GimpLayerColorSpace    blend_space;
+};
+
+
 /*  static variables  */
 
 static GimpLayerModeInfo layer_mode_infos[]=
@@ -1014,7 +1027,7 @@ gimp_layer_modes_init (void)
     }
 }
 
-const GimpLayerModeInfo *
+static const GimpLayerModeInfo *
 gimp_layer_mode_info (GimpLayerMode mode)
 {
   g_return_val_if_fail (mode < G_N_ELEMENTS (layer_mode_infos),
diff --git a/app/operations/layer-modes/gimp-layer-modes.h b/app/operations/layer-modes/gimp-layer-modes.h
index fb3df8c9a5..a22de5252f 100644
--- a/app/operations/layer-modes/gimp-layer-modes.h
+++ b/app/operations/layer-modes/gimp-layer-modes.h
@@ -23,23 +23,8 @@
 #define __GIMP_LAYER_MODES_H__
 
 
-typedef struct _GimpLayerModeInfo GimpLayerModeInfo;
-
-struct _GimpLayerModeInfo
-{
-  GimpLayerMode          layer_mode;
-  gchar                 *op_name;
-  GimpLayerModeFlags     flags;
-  GimpLayerCompositeMode composite_mode;
-  GimpLayerColorSpace    composite_space;
-  GimpLayerColorSpace    blend_space;
-};
-
-
 void                     gimp_layer_modes_init               (void);
 
-const GimpLayerModeInfo *gimp_layer_mode_info                (GimpLayerMode       mode);
-
 gboolean                 gimp_layer_mode_is_legacy           (GimpLayerMode       mode);
 gboolean                 gimp_layer_mode_wants_linear_data   (GimpLayerMode       mode);