diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/BaseWorkerContext.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/BaseWorkerContext.java
index 7908ebe1b..e5b80fd8d 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/BaseWorkerContext.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/BaseWorkerContext.java
@@ -1375,7 +1375,8 @@ public abstract class BaseWorkerContext extends I18nBase implements IWorkerConte
     if (valueSet != null) {
       pIn.addParameter().setName("valueSet").setResource(valueSet);
     }
-    pIn.addParameter().setName("profile").setResource(expParameters);
+    
+    pIn.addParameters(expParameters);
     return pIn;
   }
 
@@ -1388,7 +1389,7 @@ public abstract class BaseWorkerContext extends I18nBase implements IWorkerConte
     if (vsUrl != null) {
       pIn.addParameter().setName("url").setValue(new CanonicalType(vsUrl));
     }
-    pIn.addParameter().setName("profile").setResource(expParameters);
+    pIn.addParameters(expParameters);
     return pIn;
   }
 
@@ -1548,7 +1549,7 @@ public abstract class BaseWorkerContext extends I18nBase implements IWorkerConte
     if (expParameters == null) {
       throw new Error(formatMessage(I18nConstants.NO_EXPANSIONPROFILE_PROVIDED));
     }
-    pin.addParameter().setName("profile").setResource(expParameters);
+    pin.addParameters(expParameters);
 
     if (options.isDisplayWarningMode()) {
       pin.addParameter("mode","lenient-display-validation");
diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/model/Parameters.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/model/Parameters.java
index c5b362491..d9ae0ad06 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/model/Parameters.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/model/Parameters.java
@@ -1856,6 +1856,18 @@ public String toString() {
     getParameter().removeIf(p -> name.equals(p.getName()));  
   }
 
+  public void addParameters(Parameters expParameters) {
+    addParameters(expParameters.getParameter());    
+  }
+
+  private void addParameters(List<ParametersParameterComponent> parameters) {
+    for (ParametersParameterComponent p : parameters) {
+      if (!hasParameter(p.getName())) {
+        addParameter(p);
+      }
+    }
+  }
+
   // end addition
 
 }