diff --git a/src/js/game/hud/parts/base_toolbar.js b/src/js/game/hud/parts/base_toolbar.js
index 551763ec..d69bcbb2 100644
--- a/src/js/game/hud/parts/base_toolbar.js
+++ b/src/js/game/hud/parts/base_toolbar.js
@@ -108,9 +108,16 @@ export class HUDBaseToolbar extends BaseHUDPart {
             return;
         }
 
+        let addIndex;
+        if (this.root.keyMapper.getBinding(KEYMAPPINGS.placement.rotateInverseModifier).pressed) {
+            addIndex = this.supportedBuildings.length - 1;
+        } else {
+            addIndex = 1;
+        }
+
         let process = false;
         let newIndex = this.lastSelectedIndex;
-        for (let i = 0; i < this.supportedBuildings.length; ++i, ++newIndex) {
+        for (let i = 0; i < this.supportedBuildings.length; ++i, newIndex += addIndex) {
             newIndex %= this.supportedBuildings.length;
             const metaBuilding = gMetaBuildingRegistry.findByClass(this.supportedBuildings[newIndex]);
             const handle = this.buildingHandles[metaBuilding.id];
diff --git a/src/js/game/hud/parts/building_placer_logic.js b/src/js/game/hud/parts/building_placer_logic.js
index d0737df8..97db9102 100644
--- a/src/js/game/hud/parts/building_placer_logic.js
+++ b/src/js/game/hud/parts/building_placer_logic.js
@@ -504,7 +504,15 @@ export class HUDBuildingPlacerLogic extends BaseHUDPart {
                 index >= 0,
                 "Current variant was invalid: " + this.currentVariant.get() + " out of " + availableVariants
             );
-            const newIndex = (index + 1) % availableVariants.length;
+
+            let addIndex;
+            if (this.root.keyMapper.getBinding(KEYMAPPINGS.placement.rotateInverseModifier).pressed) {
+                addIndex = availableVariants.length - 1;
+            } else {
+                addIndex = 1;
+            }
+
+            const newIndex = (index + addIndex) % availableVariants.length;
             const newVariant = availableVariants[newIndex];
             this.currentVariant.set(newVariant);