diff --git a/src/main/kotlin/ru/dbotthepony/kstarbound/util/SBPattern.kt b/src/main/kotlin/ru/dbotthepony/kstarbound/util/SBPattern.kt
index 217be2ad..c60d4ee2 100644
--- a/src/main/kotlin/ru/dbotthepony/kstarbound/util/SBPattern.kt
+++ b/src/main/kotlin/ru/dbotthepony/kstarbound/util/SBPattern.kt
@@ -3,6 +3,7 @@ package ru.dbotthepony.kstarbound.util
 import com.google.common.collect.ImmutableList
 import com.google.common.collect.ImmutableMap
 import com.google.common.collect.ImmutableSet
+import com.google.common.collect.Interners
 import com.google.gson.Gson
 import com.google.gson.TypeAdapter
 import com.google.gson.TypeAdapterFactory
@@ -102,6 +103,7 @@ class SBPattern private constructor(
 		override fun <T : Any?> create(gson: Gson, type: TypeToken<T>): TypeAdapter<T>? {
 			if (type.rawType == SBPattern::class.java) {
 				return object : TypeAdapter<SBPattern>() {
+					private val interner = Interners.newWeakInterner<SBPattern>()
 					private val strings = gson.getAdapter(String::class.java)
 
 					override fun write(out: JsonWriter, value: SBPattern?) {
@@ -109,7 +111,7 @@ class SBPattern private constructor(
 					}
 
 					override fun read(`in`: JsonReader): SBPattern? {
-						return of(strings.read(`in`) ?: return null)
+						return interner.intern(of(strings.read(`in`) ?: return null))
 					}
 				} as TypeAdapter<T>
 			}