diff --git a/plugins/org.eclipse.epsilon.eol.engine/src/org/eclipse/epsilon/eol/execute/operations/contributors/NumberOperationContributor.java b/plugins/org.eclipse.epsilon.eol.engine/src/org/eclipse/epsilon/eol/execute/operations/contributors/NumberOperationContributor.java
index cfd7e2b59..4cc5e7d1c 100644
--- a/plugins/org.eclipse.epsilon.eol.engine/src/org/eclipse/epsilon/eol/execute/operations/contributors/NumberOperationContributor.java
+++ b/plugins/org.eclipse.epsilon.eol.engine/src/org/eclipse/epsilon/eol/execute/operations/contributors/NumberOperationContributor.java
@@ -11,7 +11,7 @@
 
 import java.util.stream.LongStream;
 
-import org.eclipse.epsilon.eol.staticanalyser.types.EolPrimitiveType;
+import org.eclipse.epsilon.eol.staticanalyser.types.EolNativeType;
 import org.eclipse.epsilon.eol.staticanalyser.types.EolType;
 import org.eclipse.epsilon.eol.types.NumberUtil;
 
@@ -22,10 +22,9 @@ public boolean contributesTo(Object target) {
 		return target instanceof Number;
 	}
 	
-	//TODO Replace this with EolNativeType<Number>
 	@Override
 	public EolType contributesToType() {
-		return EolPrimitiveType.Integer;
+		return new EolNativeType(Number.class);
 	}
 	
 	@Override
diff --git a/plugins/org.eclipse.epsilon.eol.engine/src/org/eclipse/epsilon/eol/staticanalyser/EolStaticAnalyser.java b/plugins/org.eclipse.epsilon.eol.engine/src/org/eclipse/epsilon/eol/staticanalyser/EolStaticAnalyser.java
index 4bf266659..ccdba67a0 100644
--- a/plugins/org.eclipse.epsilon.eol.engine/src/org/eclipse/epsilon/eol/staticanalyser/EolStaticAnalyser.java
+++ b/plugins/org.eclipse.epsilon.eol.engine/src/org/eclipse/epsilon/eol/staticanalyser/EolStaticAnalyser.java
@@ -1247,6 +1247,22 @@ public EolType javaClassToEolType(Class<?> javaClass) {
 			return EolCollectionType.Set;
 		} else if (javaClass == java.util.Map.class) {
 			return EolMapType.Map;
+		} else if (javaClass == org.eclipse.epsilon.eol.types.EolCollection.class) {
+			return EolCollectionType.Collection;
+		} else if (javaClass == org.eclipse.epsilon.eol.types.EolBag.class) {
+			return EolCollectionType.Bag;
+		} else if (javaClass == org.eclipse.epsilon.eol.types.EolSequence.class) {
+			return EolCollectionType.Sequence;
+		} else if (javaClass == org.eclipse.epsilon.eol.types.EolSet.class) {
+			return EolCollectionType.Set;
+		} else if (javaClass == org.eclipse.epsilon.eol.types.EolOrderedSet.class) {
+			return EolCollectionType.OrderedSet;
+		} else if (javaClass == org.eclipse.epsilon.eol.types.concurrent.EolConcurrentBag.class) {
+			return EolCollectionType.ConcurrentBag;
+		} else if (javaClass == org.eclipse.epsilon.eol.types.concurrent.EolConcurrentSet.class) {
+			return EolCollectionType.ConcurrentSet;
+		} else if (javaClass == org.eclipse.epsilon.eol.types.concurrent.EolConcurrentMap.class) {
+			return EolMapType.ConcurrentMap;
 		} else {
 			return new EolNativeType(javaClass);
 		}
diff --git a/tests/org.eclipse.epsilon.eol.staticanalyser.tests/src/org/eclipse/epsilon/eol/staticanalyser/tests/scripts/RealOperationContributor.eol b/tests/org.eclipse.epsilon.eol.staticanalyser.tests/src/org/eclipse/epsilon/eol/staticanalyser/tests/scripts/RealOperationContributor.eol
index 648c03b15..32e8e2841 100644
--- a/tests/org.eclipse.epsilon.eol.staticanalyser.tests/src/org/eclipse/epsilon/eol/staticanalyser/tests/scripts/RealOperationContributor.eol
+++ b/tests/org.eclipse.epsilon.eol.staticanalyser.tests/src/org/eclipse/epsilon/eol/staticanalyser/tests/scripts/RealOperationContributor.eol
@@ -6,6 +6,4 @@
 /*Native<java.lang.Number>*/1.1.max(2.2);
 /*Native<java.lang.Number>*/1.1.min(2.2);
 /*Native<java.lang.Number>*/1.1.pow(2.2);
-/*Integer*/1.1.round();
-
-
+/*Integer*/1.1.round();
\ No newline at end of file