diff --git a/types/jasmine/index.d.ts b/types/jasmine/index.d.ts
index cd1d5de31e..37e1fd2b14 100644
--- a/types/jasmine/index.d.ts
+++ b/types/jasmine/index.d.ts
@@ -221,6 +221,8 @@ declare namespace jasmine {
     interface CustomMatcher {
         compare<T>(actual: T, expected: T, ...args: any[]): CustomMatcherResult;
         compare(actual: any, ...expected: any[]): CustomMatcherResult;
+        negativeCompare?<T>(actual: T, expected: T, ...args: any[]): CustomMatcherResult;
+        negativeCompare?(actual: any, ...expected: any[]): CustomMatcherResult;
     }
 
     type CustomMatcherFactory = (util: MatchersUtil, customEqualityTesters: CustomEqualityTester[]) => CustomMatcher;
diff --git a/types/jasmine/jasmine-tests.ts b/types/jasmine/jasmine-tests.ts
index 54e97ed73e..e96293ced4 100644
--- a/types/jasmine/jasmine-tests.ts
+++ b/types/jasmine/jasmine-tests.ts
@@ -968,7 +968,13 @@ var customMatchers: jasmine.CustomMatcherFactories = {
         return {
             compare: (actual: any, floor: number, ceiling: number): jasmine.CustomMatcherResult => {
                 const pass = actual >= floor && actual <= ceiling;
-                const message = `expected ${actual} ${pass ? 'not ' : ''} to be within range ${floor}-${ceiling}`;
+                const message = `expected ${actual} to be within range ${floor}-${ceiling}`;
+                return { message, pass };
+            },
+
+            negativeCompare: (actual: any, floor: number, ceiling: number): jasmine.CustomMatcherResult => {
+                const pass = actual < floor && actual > ceiling;
+                const message = `expected ${actual} not to be within range ${floor}-${ceiling}`;
                 return { message, pass };
             }
         };
@@ -1011,6 +1017,14 @@ describe("Custom matcher: 'toBeGoofy'", () => {
         expect(2).toBeWithinRange(1, 3);
     });
 
+    it("can use the custom negativeCompare method", () => {
+        const matcher = customMatchers["toBeWithinRange"](jasmine.matchersUtil, []);
+        const result = matcher.negativeCompare!(1, 2, 3);
+
+        expect(result.pass).toBe(false);
+        expect(result.message).toBe("expected 1 not to be within range 2-3");
+    });
+
     it("can be negated", () => {
         expect({
             hyuk: 'this is fun'