diff --git a/src/st/st-icon-theme-private.h b/src/st/st-icon-theme-private.h
deleted file mode 100644
index 8a32cc511..000000000
--- a/src/st/st-icon-theme-private.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/* GTK - The GIMP Toolkit
- * Copyright (C) 2015 Benjamin Otte <otte@gnome.org>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef __GTK_ICON_THEME_PRIVATE_H__
-#define __GTK_ICON_THEME_PRIVATE_H__
-
-#include "st-icon-theme.h"
-#include <gtk/gtkcssstyleprivate.h>
-
-void        gtk_icon_theme_lookup_symbolic_colors       (GtkCssStyle    *style,
-                                                         GdkRGBA        *color_out,
-                                                         GdkRGBA        *success_out,
-                                                         GdkRGBA        *warning_out,
-                                                         GdkRGBA        *error_out);
-
-GtkIconInfo *gtk_icon_info_new_for_file (GFile *file,
-                                         gint   size,
-                                         gint   scale);
-
-GdkPixbuf * gtk_icon_theme_color_symbolic_pixbuf (GdkPixbuf     *symbolic,
-                                                  const GdkRGBA *fg_color,
-                                                  const GdkRGBA *success_color,
-                                                  const GdkRGBA *warning_color,
-                                                  const GdkRGBA *error_color);
-
-
-#endif /* __GTK_ICON_THEME_PRIVATE_H__ */
diff --git a/src/st/st-icon-theme.c b/src/st/st-icon-theme.c
index 87cd907ff..b99ab7420 100644
--- a/src/st/st-icon-theme.c
+++ b/src/st/st-icon-theme.c
@@ -38,7 +38,7 @@
 #include "win32/gdkwin32.h"
 #endif /* G_OS_WIN32 */
 
-#include "st-icon-theme-private.h"
+#include "st-icon-theme.h"
 #include "gtkcsspalettevalueprivate.h"
 #include "gtkcssrgbavalueprivate.h"
 #include "gtkdebug.h"
@@ -354,6 +354,9 @@ static IconSuffix   theme_dir_get_icon_suffix (IconThemeDir     *dir,
 static GtkIconInfo *icon_info_new             (IconThemeDirType  type,
                                                gint              dir_size,
                                                gint              dir_scale);
+static GtkIconInfo *gtk_icon_info_new_for_file (GFile           *file,
+                                                gint             size,
+                                                gint             scale);
 static GtkIconInfo *icon_info_new_builtin     (BuiltinIcon      *icon);
 static IconSuffix   suffix_from_name          (const gchar      *name);
 static BuiltinIcon *find_builtin_icon         (const gchar      *icon_name,
@@ -4467,12 +4470,12 @@ rgba_to_pixel(const GdkRGBA  *rgba,
   pixel[3] = 255;
 }
 
-GdkPixbuf *
-gtk_icon_theme_color_symbolic_pixbuf (GdkPixbuf     *symbolic,
-                                      const GdkRGBA *fg_color,
-                                      const GdkRGBA *success_color,
-                                      const GdkRGBA *warning_color,
-                                      const GdkRGBA *error_color)
+static GdkPixbuf *
+color_symbolic_pixbuf (GdkPixbuf     *symbolic,
+                       const GdkRGBA *fg_color,
+                       const GdkRGBA *success_color,
+                       const GdkRGBA *warning_color,
+                       const GdkRGBA *error_color)
 {
   int width, height, x, y, src_stride, dst_stride;
   guchar *src_data, *dst_data;
@@ -4582,11 +4585,11 @@ gtk_icon_info_load_symbolic_png (GtkIconInfo    *icon_info,
       return NULL;
     }
 
-  return gtk_icon_theme_color_symbolic_pixbuf (icon_info->pixbuf,
-                                               fg ? fg : &fg_default,
-                                               success_color ? success_color : &success_default,
-                                               warning_color ? warning_color : &warning_default,
-                                               error_color ? error_color : &error_default);
+  return color_symbolic_pixbuf (icon_info->pixbuf,
+                                fg ? fg : &fg_default,
+                                success_color ? success_color : &success_default,
+                                warning_color ? warning_color : &warning_default,
+                                error_color ? error_color : &error_default);
 }
 
 static GdkPixbuf *
@@ -4862,7 +4865,7 @@ gtk_icon_info_load_symbolic (GtkIconInfo    *icon_info,
                                                error);
 }
 
-void
+static void
 gtk_icon_theme_lookup_symbolic_colors (GtkCssStyle *style,
                                        GdkRGBA     *color_out,
                                        GdkRGBA     *success_out,
@@ -5754,7 +5757,7 @@ gtk_icon_info_new_for_pixbuf (GtkIconTheme *icon_theme,
   return info;
 }
 
-GtkIconInfo *
+static GtkIconInfo *
 gtk_icon_info_new_for_file (GFile *file,
                             gint   size,
                             gint   scale)