diff --git a/common/src/main/kotlin/com/google/ai/client/generativeai/common/server/Types.kt b/common/src/main/kotlin/com/google/ai/client/generativeai/common/server/Types.kt
index 0fa28ff4..af315c12 100644
--- a/common/src/main/kotlin/com/google/ai/client/generativeai/common/server/Types.kt
+++ b/common/src/main/kotlin/com/google/ai/client/generativeai/common/server/Types.kt
@@ -138,6 +138,6 @@ enum class FinishReason {
 }
 
 @Serializable
-data class GRpcError(val code: Int, val message: String, val details: List<GRpcErrorDetails>)
+data class GRpcError(val code: Int, val message: String, val details: List<GRpcErrorDetails> = emptyList())
 
 @Serializable data class GRpcErrorDetails(val reason: String? = null)