diff --git a/types/mathjs/index.d.ts b/types/mathjs/index.d.ts
index 8b133c29f7..6cb49323fa 100644
--- a/types/mathjs/index.d.ts
+++ b/types/mathjs/index.d.ts
@@ -2876,6 +2876,7 @@ declare namespace math {
     interface Parser {
         eval(expr: string): any;
         get(variable: string): any;
+        getAll(): { [key: string]: any; };
         set: (variable: string, value: any) => void;
         clear: () => void;
     }
diff --git a/types/mathjs/mathjs-tests.ts b/types/mathjs/mathjs-tests.ts
index 38aedea488..babfa3ff37 100644
--- a/types/mathjs/mathjs-tests.ts
+++ b/types/mathjs/mathjs-tests.ts
@@ -179,6 +179,7 @@ Expressions examples
 
 		const x = parser.get('x');
 		const f = parser.get('f');
+		const y = parser.getAll();
 		const g = f(3, 3);
 
 		parser.set('h', 500);