diff --git a/fdbserver/SimulatedCluster.actor.cpp b/fdbserver/SimulatedCluster.actor.cpp
index 76f392aea5..d6ea3e2e35 100644
--- a/fdbserver/SimulatedCluster.actor.cpp
+++ b/fdbserver/SimulatedCluster.actor.cpp
@@ -857,7 +857,7 @@ private:
 	void generateNormalConfig(const TestConfig& testConfig);
 };
 
-SimulationConfig::SimulationConfig(const TestConfig& testConfig) {
+SimulationConfig::SimulationConfig(const TestConfig& testConfig) : extraDB(testConfig.extraDB) {
 	generateNormalConfig(testConfig);
 }