diff --git a/scripts/build.sh b/scripts/build.sh
index ea382f10fad..395a0fe8094 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -198,7 +198,12 @@ buildAndroidRunFlask(){
 
 buildIosSimulator(){
 	prebuild_ios
-	react-native run-ios --port=$WATCHER_PORT
+	if [ -n "$IOS_SIMULATOR" ]; then
+		SIM_OPTION="--simulator \"$IOS_SIMULATOR\""
+	else
+		SIM_OPTION=""
+	fi
+	react-native run-ios --port=$WATCHER_PORT $SIM_OPTION
 }
 
 buildIosSimulatorQA(){