diff --git a/jOOQ/src/main/java/org/jooq/impl/IsDocument.java b/jOOQ/src/main/java/org/jooq/impl/IsDocument.java
index 4ebdde44c9..2354219913 100644
--- a/jOOQ/src/main/java/org/jooq/impl/IsDocument.java
+++ b/jOOQ/src/main/java/org/jooq/impl/IsDocument.java
@@ -61,11 +61,6 @@ final class IsDocument extends AbstractCondition {
         this.isDocument = isDocument;
     }
 
-    @Override
-    final boolean isNullable() {
-        return false;
-    }
-
     @Override
     public final void accept(Context<?> ctx) {
         ctx.visit(field).sql(' ').visit(isDocument ? K_IS_DOCUMENT : K_IS_NOT_DOCUMENT);
diff --git a/jOOQ/src/main/java/org/jooq/impl/IsJSON.java b/jOOQ/src/main/java/org/jooq/impl/IsJSON.java
index 5b90c642a9..cb607070ee 100644
--- a/jOOQ/src/main/java/org/jooq/impl/IsJSON.java
+++ b/jOOQ/src/main/java/org/jooq/impl/IsJSON.java
@@ -65,11 +65,6 @@ final class IsJSON extends AbstractCondition {
         this.isJSON = isJSON;
     }
 
-    @Override
-    final boolean isNullable() {
-        return false;
-    }
-
     @Override
     public final void accept(Context<?> ctx) {
         switch (ctx.family()) {