diff --git a/src/main/java/com/sk89q/worldguard/bukkit/util/Materials.java b/src/main/java/com/sk89q/worldguard/bukkit/util/Materials.java
index 5f5a0692..abf73334 100644
--- a/src/main/java/com/sk89q/worldguard/bukkit/util/Materials.java
+++ b/src/main/java/com/sk89q/worldguard/bukkit/util/Materials.java
@@ -680,6 +680,8 @@ public static boolean isUseFlagApplicable(Material material) {
             case TRIPWIRE: return true;
             case DIODE_BLOCK_OFF: return true;
             case DIODE_BLOCK_ON: return true;
+            case REDSTONE_COMPARATOR_OFF: return true;
+            case REDSTONE_COMPARATOR_ON: return true;
             case WOODEN_DOOR: return true;
             case TRAP_DOOR: return true;
             case FENCE_GATE: return true;