diff --git a/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/TGeoManager.kt b/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/TGeoManager.kt
index 26517477..557783ae 100644
--- a/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/TGeoManager.kt
+++ b/cern-root-loader/src/commonMain/kotlin/ru/mipt/npm/root/TGeoManager.kt
@@ -20,6 +20,9 @@ public class TGeoManager : TNamed() {
          * Load Json encoded TGeoManager
          */
         public fun decodeFromJson(jsonObject: JsonObject): TGeoManager = TODO()
+        
+        public fun decodeFromString(string: String): TGeoManager =
+            RootJsonSerialFormat().decodeFromString(serializer(), string)
     }
 }