diff --git a/src/MutateJS.cpp b/src/MutateJS.cpp
index a28e2f16..f72b6b62 100644
--- a/src/MutateJS.cpp
+++ b/src/MutateJS.cpp
@@ -122,13 +122,13 @@ namespace mssql
 		return val;
 	}
 	
-	Local<Value> MutateJS::get_array_elelemt_at_index(const Local<Array>& arr, const int index)
+	Local<Value> MutateJS::get_array_elelemt_at_index(const Local<Array>& arr, const unsigned int index)
 	{
 		const auto elem = arr->Get(index);
 		return elem;
 	}
 
-	void MutateJS::set_array_elelemt_at_index(const Local<Array>& arr, const int index, const Local<Value>& value)
+	void MutateJS::set_array_elelemt_at_index(const Local<Array>& arr, const unsigned int index, const Local<Value>& value)
 	{
 		arr->Set(index, value);
 	}