diff --git a/dlls/wined3d/surface.c b/dlls/wined3d/surface.c
index 110e2069003..f0cfeb415b9 100644
--- a/dlls/wined3d/surface.c
+++ b/dlls/wined3d/surface.c
@@ -4245,10 +4245,10 @@ HRESULT d3dfmt_get_conv(const struct wined3d_surface *surface, BOOL need_alpha_c
     return WINED3D_OK;
 }
 
-void d3dfmt_p8_init_palette(struct wined3d_surface *surface, BYTE table[256][4], BOOL colorkey)
+void d3dfmt_p8_init_palette(const struct wined3d_surface *surface, BYTE table[256][4], BOOL colorkey)
 {
-    struct wined3d_device *device = surface->resource.device;
-    struct wined3d_palette *pal = surface->palette;
+    const struct wined3d_device *device = surface->resource.device;
+    const struct wined3d_palette *pal = surface->palette;
     BOOL index_in_alpha = FALSE;
     unsigned int i;
 
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index c2cb075ca54..ca852eeb2f5 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -2162,7 +2162,7 @@ typedef enum {
 
 HRESULT d3dfmt_get_conv(const struct wined3d_surface *surface, BOOL need_alpha_ck, BOOL use_texturing,
         struct wined3d_format *format, CONVERT_TYPES *convert) DECLSPEC_HIDDEN;
-void d3dfmt_p8_init_palette(struct wined3d_surface *surface, BYTE table[256][4], BOOL colorkey) DECLSPEC_HIDDEN;
+void d3dfmt_p8_init_palette(const struct wined3d_surface *surface, BYTE table[256][4], BOOL colorkey) DECLSPEC_HIDDEN;
 
 BOOL palette9_changed(struct wined3d_surface *surface) DECLSPEC_HIDDEN;