diff --git a/jOOQ/src/main/java/org/jooq/impl/DateAdd.java b/jOOQ/src/main/java/org/jooq/impl/DateAdd.java
index 4c9095b67e..b139f07708 100644
--- a/jOOQ/src/main/java/org/jooq/impl/DateAdd.java
+++ b/jOOQ/src/main/java/org/jooq/impl/DateAdd.java
@@ -65,6 +65,9 @@ class DateAdd<T> extends AbstractFunction<T> {
         Factory create = create(configuration);
 
         switch (configuration.getDialect()) {
+            case ASE:
+                return new Function<T>("dateadd", getDataType(), literal("day"), val(value), field);
+
             case DB2:
             case HSQLDB:
                 return field.add(create.field("? day", BigDecimal.class, value));
diff --git a/jOOQ/src/main/java/org/jooq/impl/DateSub.java b/jOOQ/src/main/java/org/jooq/impl/DateSub.java
index 40dd9abaf8..6f8296dac4 100644
--- a/jOOQ/src/main/java/org/jooq/impl/DateSub.java
+++ b/jOOQ/src/main/java/org/jooq/impl/DateSub.java
@@ -65,6 +65,9 @@ class DateSub<T> extends AbstractFunction<T> {
         Factory create = create(configuration);
 
         switch (configuration.getDialect()) {
+            case ASE:
+                return new Function<T>("dateadd", getDataType(), literal("day"), val(-value.intValue()), field);
+
             case DB2:
             case HSQLDB:
                 return field.sub(create.field("? day", BigDecimal.class, value));