diff --git a/dlls/wined3d/utils.c b/dlls/wined3d/utils.c
index 669c8cbbbd2..06ff97ce8fb 100644
--- a/dlls/wined3d/utils.c
+++ b/dlls/wined3d/utils.c
@@ -6378,16 +6378,6 @@ int wined3d_ffp_frag_program_key_compare(const void *key, const struct wine_rb_e
     return memcmp(ka, kb, sizeof(*ka));
 }
 
-static enum wined3d_material_color_source validate_material_colour_source(WORD use_map,
-        enum wined3d_material_color_source source)
-{
-    if (source == WINED3D_MCS_COLOR1 && use_map & (1u << WINED3D_FFP_DIFFUSE))
-        return source;
-    if (source == WINED3D_MCS_COLOR2 && use_map & (1u << WINED3D_FFP_SPECULAR))
-        return source;
-    return WINED3D_MCS_MATERIAL;
-}
-
 void wined3d_ffp_get_vs_settings(const struct wined3d_context *context,
         const struct wined3d_state *state, struct wined3d_ffp_vs_settings *settings)
 {
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 2525fca9c1b..0a629dd5539 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -4840,6 +4840,16 @@ static inline void wined3d_not_from_cs(struct wined3d_cs *cs)
     assert(cs->thread_id != GetCurrentThreadId());
 }
 
+static inline enum wined3d_material_color_source validate_material_colour_source(WORD use_map,
+        enum wined3d_material_color_source source)
+{
+    if (source == WINED3D_MCS_COLOR1 && use_map & (1u << WINED3D_FFP_DIFFUSE))
+        return source;
+    if (source == WINED3D_MCS_COLOR2 && use_map & (1u << WINED3D_FFP_SPECULAR))
+        return source;
+    return WINED3D_MCS_MATERIAL;
+}
+
 /* The WNDCLASS-Name for the fake window which we use to retrieve the GL capabilities */
 #define WINED3D_OPENGL_WINDOW_CLASS_NAME "WineD3D_OpenGL"