diff --git a/FlagsmithClient/src/main/java/com/flagsmith/Flagsmith.kt b/FlagsmithClient/src/main/java/com/flagsmith/Flagsmith.kt
index 2842383..de7db9b 100644
--- a/FlagsmithClient/src/main/java/com/flagsmith/Flagsmith.kt
+++ b/FlagsmithClient/src/main/java/com/flagsmith/Flagsmith.kt
@@ -38,7 +38,7 @@ class Flagsmith constructor(
     private val enableRealtimeUpdates: Boolean = false,
     private val analyticsFlushPeriod: Int = DEFAULT_ANALYTICS_FLUSH_PERIOD_SECONDS,
     private val cacheConfig: FlagsmithCacheConfig = FlagsmithCacheConfig(),
-    private val defaultFlags: List<Flag> = emptyList(),
+    private val defaultFlags: List<Flag>? = emptyList(),
     private val requestTimeoutSeconds: Long = 4L,
     private val readTimeoutSeconds: Long = 6L,
     private val writeTimeoutSeconds: Long = 6L,