diff --git a/lodash/lodash-tests.ts b/lodash/lodash-tests.ts
index d36b5dfc4..b72ddddcb 100644
--- a/lodash/lodash-tests.ts
+++ b/lodash/lodash-tests.ts
@@ -1086,6 +1086,14 @@ result = <Object>_([1]).toPlainObject();
 result = <Object>_<string>([]).toPlainObject();
 result = <Object>_({}).toPlainObject();
 
+/********
+ * Math *
+ ********/
+
+// _.add
+result = <number>_.add(1, 1);
+result = <number>_(1).add(1);
+
 /**********
 * Objects *
 ***********/
diff --git a/lodash/lodash.d.ts b/lodash/lodash.d.ts
index 7c4111746..b576ccd7e 100644
--- a/lodash/lodash.d.ts
+++ b/lodash/lodash.d.ts
@@ -5908,6 +5908,28 @@ declare module _ {
         toPlainObject(value?: any): Object;
     }
 
+    /********
+     * Math *
+     ********/
+
+    //_.add
+    interface LoDashStatic {
+        /**
+         * Adds two numbers.
+         * @param augend The first number to add.
+         * @param addend The second number to add.
+         * @return Returns the sum.
+         */
+        add(augend: number, addend: number): number;
+    }
+
+    interface LoDashWrapper<T> {
+        /**
+         * @see _.add
+         */
+        add(addend: number): number;
+    }
+
     /*************
      * Objects   *
      *************/