diff --git a/src/main/java/net/smoofyuniverse/superpiston/util/RegistryUtil.java b/src/main/java/net/smoofyuniverse/superpiston/util/RegistryUtil.java
index 896b781..a93458a 100644
--- a/src/main/java/net/smoofyuniverse/superpiston/util/RegistryUtil.java
+++ b/src/main/java/net/smoofyuniverse/superpiston/util/RegistryUtil.java
@@ -65,7 +65,7 @@ public static <V> Map<BlockState, V> resolveBlockStates(Map<String, V> map) {
 
 				Stream<BlockState> matchedStates = blockTypeRegistry.stream()
 						.flatMap(type -> type.validStates().stream())
-						.filter(state -> pattern.matcher(state.toString()).matches());
+						.filter(state -> pattern.matcher(state.asString()).matches());
 
 				if (negate)
 					matchedStates.forEach(states::remove);