diff --git a/src/classes/where-clause/where-clause.ts b/src/classes/where-clause/where-clause.ts
index 8d0e7e21f..722bda114 100644
--- a/src/classes/where-clause/where-clause.ts
+++ b/src/classes/where-clause/where-clause.ts
@@ -55,6 +55,7 @@ export class WhereClause implements IWhereClause {
    * 
    **/
   equals(value: IndexableType) {
+    if (value == null) return fail(this, INVALID_KEY_ARGUMENT);
     return new this.Collection(this, () => rangeEqual(value)) as ICollection;
   }