diff --git a/hibernate-core/src/main/java/org/hibernate/query/spi/AbstractCommonQueryContract.java b/hibernate-core/src/main/java/org/hibernate/query/spi/AbstractCommonQueryContract.java
index fc328b2071c5..ba4243cfd321 100644
--- a/hibernate-core/src/main/java/org/hibernate/query/spi/AbstractCommonQueryContract.java
+++ b/hibernate-core/src/main/java/org/hibernate/query/spi/AbstractCommonQueryContract.java
@@ -749,15 +749,10 @@ public CommonQueryContract setParameter(String name, Object value) {
 		}
 		else {
 			final QueryParameterBinding<Object> binding = getQueryParameterBindings().getBinding( name );
-			final QueryParameter<Object> param = binding.getQueryParameter();
-			if ( param.allowsMultiValuedBinding() ) {
-				final BindableType<?> hibernateType = param.getHibernateType();
-				if ( hibernateType == null || isInstance( hibernateType, value ) ) {
-					if ( value instanceof Collection<?> collection
-							&& !isRegisteredAsBasicType( value.getClass() ) ) {
-						return setParameterList( name, collection );
-					}
-				}
+			if ( multipleBinding( binding.getQueryParameter(), value )
+				&& value instanceof Collection<?> collectionValue
+				&& !isRegisteredAsBasicType( value.getClass() ) ) {
+				return setParameterList( name, collectionValue );
 			}
 			binding.setBindValue( value, resolveJdbcParameterTypeIfNecessary() );
 		}
@@ -765,6 +760,18 @@ public CommonQueryContract setParameter(String name, Object value) {
 		return this;
 	}
 
+	private boolean multipleBinding(QueryParameter<Object> param, Object value){
+		if ( param.allowsMultiValuedBinding() ) {
+			final BindableType<?> hibernateType = param.getHibernateType();
+			if ( hibernateType == null
+				|| hibernateType instanceof NullSqmExpressible
+				|| isInstance( hibernateType, value ) ) {
+				return true;
+			}
+		}
+		return false;
+	}
+
 	private <T> void setTypedParameter(String name, TypedParameterValue<T> typedValue) {
 		final BindableType<T> type = typedValue.getType();
 		setParameter( name, typedValue.getValue(), type != null ? type : typedValue.getTypeReference() );
@@ -815,17 +822,10 @@ public CommonQueryContract setParameter(int position, Object value) {
 		}
 		else {
 			final QueryParameterBinding<Object> binding = getQueryParameterBindings().getBinding( position );
-			final QueryParameter<Object> param = binding.getQueryParameter();
-			if ( param.allowsMultiValuedBinding() ) {
-				final BindableType<?> hibernateType = param.getHibernateType();
-				if ( hibernateType == null
-						|| hibernateType instanceof NullSqmExpressible
-						|| isInstance( hibernateType, value ) ) {
-					if ( value instanceof Collection<?> collection
-							&& !isRegisteredAsBasicType( value.getClass() ) ) {
-						return setParameterList( position, collection );
-					}
-				}
+			if ( multipleBinding( binding.getQueryParameter(), value )
+				&& value instanceof Collection<?> collectionValue
+				&& !isRegisteredAsBasicType( value.getClass() ) ) {
+				return setParameterList( position, collectionValue );
 			}
 			binding.setBindValue( value, resolveJdbcParameterTypeIfNecessary() );
 		}
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/query/SelectCaseWhenNullLiteralTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/query/SelectCaseWhenNullLiteralTest.java
index 0fb225e4c357..4aba139cccf1 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/query/SelectCaseWhenNullLiteralTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/query/SelectCaseWhenNullLiteralTest.java
@@ -82,6 +82,30 @@ public void testSelectCaseWhenNullLiteralWithParameters(SessionFactoryScope scop
 		);
 	}
 
+	@Test
+	@JiraKey( "HHH-19291" )
+	public void testSelectCaseWhenNullLiteralWithParametersWithNamedParameters(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					List result = session.createQuery( "select case when 1=1 then :value else null end from Person p" )
+							.setParameter( "value", 2 )
+							.list();
+					assertThat( result.size(), is( 1 ) );
+					assertThat( result.get( 0 ), is( 2 ) );
+				}
+		);
+
+		scope.inTransaction(
+				session -> {
+					List result = session.createQuery( "select count(case when 1=1 then :value else null end) from Person p" )
+							.setParameter( "value", 2 )
+							.list();
+					assertThat( result.size(), is( 1 ) );
+					assertThat( result.get( 0 ), is( 1L ) );
+				}
+		);
+	}
+
 	@Entity(name = "Person")
 	@Table(name = "PERSON_TABLE")
 	public static class Person {