diff --git a/Yafc/Widgets/ObjectTooltip.cs b/Yafc/Widgets/ObjectTooltip.cs
index e8ba509a..aa6eab52 100644
--- a/Yafc/Widgets/ObjectTooltip.cs
+++ b/Yafc/Widgets/ObjectTooltip.cs
@@ -391,7 +391,7 @@ private void BuildGoods(Goods goods, Quality quality, ImGui gui) {
         }
     }
 
-    private void BuildRecipe(RecipeOrTechnology recipe, ImGui gui) {
+    private static void BuildRecipe(RecipeOrTechnology recipe, ImGui gui) {
         using (gui.EnterGroup(contentPadding, RectAllocator.LeftRow)) {
             gui.BuildIcon(Icon.Time, 2f, SchemeColor.BackgroundText);
             gui.BuildText(DataUtils.FormatAmount(recipe.time, UnitOfMeasure.Second));
@@ -497,7 +497,7 @@ private void BuildRecipe(RecipeOrTechnology recipe, ImGui gui) {
         }
     }
 
-    private void BuildTechnology(Technology technology, ImGui gui) {
+    private static void BuildTechnology(Technology technology, ImGui gui) {
         bool isResearchTriggerCraft = (technology.flags & RecipeFlags.HasResearchTriggerCraft) == RecipeFlags.HasResearchTriggerCraft;
         if (!isResearchTriggerCraft) {
             BuildRecipe(technology, gui);