diff --git a/core/src/net/sf/openrocket/document/Simulation.java b/core/src/net/sf/openrocket/document/Simulation.java
index eed9ca6a8..8d4644450 100644
--- a/core/src/net/sf/openrocket/document/Simulation.java
+++ b/core/src/net/sf/openrocket/document/Simulation.java
@@ -339,7 +339,13 @@ public class Simulation implements ChangeSource, Cloneable {
 	public static boolean isStatusUpToDate(Status status) {
 		return status == Status.UPTODATE || status == Status.LOADED || status == Status.EXTERNAL;
 	}
-	
+
+	/**
+	 * Syncs the modID with its flight configuration.
+	 */
+	public void syncModID() {
+		this.simulatedConfigurationID = getActiveConfiguration().getModID();
+	}
 	
 	
 	/**
diff --git a/core/src/net/sf/openrocket/file/openrocket/importt/OpenRocketLoader.java b/core/src/net/sf/openrocket/file/openrocket/importt/OpenRocketLoader.java
index 5460d3c99..e0bf4717b 100644
--- a/core/src/net/sf/openrocket/file/openrocket/importt/OpenRocketLoader.java
+++ b/core/src/net/sf/openrocket/file/openrocket/importt/OpenRocketLoader.java
@@ -4,6 +4,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.List;
 
+import net.sf.openrocket.rocketcomponent.ComponentChangeEvent;
 import net.sf.openrocket.rocketcomponent.FlightConfiguration;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -62,6 +63,7 @@ public class OpenRocketLoader extends AbstractRocketLoader {
 		// Deduce suitable time skip
 		double timeSkip = StorageOptions.SIMULATION_DATA_NONE;
 		for (Simulation s : doc.getSimulations()) {
+			s.syncModID();		// The config's modID can be out of sync with the simulation's after the whole loading process
 			if (s.getStatus() == Simulation.Status.EXTERNAL ||
 					s.getStatus() == Simulation.Status.NOT_SIMULATED)
 				continue;