diff --git a/src/main/java/org/snomed/snowstorm/core/data/services/ModuleDependencyService.java b/src/main/java/org/snomed/snowstorm/core/data/services/ModuleDependencyService.java
index b76238402..7093e567f 100644
--- a/src/main/java/org/snomed/snowstorm/core/data/services/ModuleDependencyService.java
+++ b/src/main/java/org/snomed/snowstorm/core/data/services/ModuleDependencyService.java
@@ -62,9 +62,6 @@ public class ModuleDependencyService extends ComponentService {
 	@Lazy
 	private ReferenceSetMemberService refsetService;
 	
-	@Value("${mdrs.exclude.derivative-modules}")
-	private boolean excludeDerivativeModules;
-	
 	@Value("#{'${mdrs.blocklist}'.split('\\s*,\\s*')}")  //Split and trim spaces
 	private List<String> blockListedModules;
 
@@ -73,10 +70,6 @@ public class ModuleDependencyService extends ComponentService {
 	private long cacheValidAt = 0L;
 	private Set<String> cachedInternationalModules;
 	
-	//Derivative modules are those belonging with the International Edition (like the GPS)
-	//but not packaged with it, so not included eg in the US Edition
-	private Set<String> derivativeModules;
-	
 	//Refresh when the HEAD time is greater than the HEAD time on MAIN
 	//Check every 30 mins to save time when export operation actually called
 	@Scheduled(fixedDelay = 1800_000, initialDelay = 180_000)
@@ -97,12 +90,6 @@ public synchronized void refreshCache() {
 			if (!cachedInternationalModules.contains(Concepts.ICD10_MODULE)) {
 				SI_MODULES.remove(Concepts.ICD10_MODULE);
 			}
-			
-			derivativeModules = cachedInternationalModules.stream()
-					.filter(m -> !SI_MODULES.contains(m))
-					.collect(Collectors.toSet());
-			
-			logger.info("{} derivative modules set to be {} in MDRS export.", derivativeModules.size(), (excludeDerivativeModules?"excluded":"included"));
 		}
 	}
 	
@@ -350,7 +337,7 @@ private String determineClosestParentFromExistingHierarchy(String module, List<S
 		
 		List<String> ancestors = findAncestorModules(module, selfMappedModules, moduleMap.get(module));
 		//If we only see a single ancestor, that's our closest parent
-		if (ancestors.size() == 0) {
+		if (ancestors.isEmpty()) {
 			return module;
 		} else if (ancestors.size() == 1) {
 			return ancestors.get(0);
@@ -525,17 +512,11 @@ private Map<String, String> getModuleOfModule(String branchPath, Set<String> mod
 	
 	public boolean isExportable(ReferenceSetMember rm, boolean isExtension) {
 		//Extensions don't list dependencies of core modules
-		if (isExtension && SI_MODULES.contains(rm.getModuleId())) {
-			return false;
-		}
-		if (excludeDerivativeModules && derivativeModules.contains(rm.getModuleId())) {
-			return false;
-		}
-		
-		if (blockListedModules != null && blockListedModules.contains(rm.getModuleId())) {
+		if ((isExtension && SI_MODULES.contains(rm.getModuleId())
+			|| (blockListedModules != null && blockListedModules.contains(rm.getModuleId())))) {
 			return false;
 		}
-		
+
 		return true;
 	}
 
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index b592d3aa1..858b94de5 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -877,7 +877,6 @@ daily-build.import.resources.cloud.path=
 #   Configuration around MDRS behaviour on versioning and export
 #   The blocklisted modules (comma separatate SCTIDs) will not be included in an exported MDRS
 # ----------------------------------------
-mdrs.exclude.derivative-modules=true
 mdrs.blocklist=
 
 # Particular code systems in which the version will appear after the published date