diff --git a/mock/mock.go b/mock/mock.go
index 007643f..515eec7 100644
--- a/mock/mock.go
+++ b/mock/mock.go
@@ -352,7 +352,7 @@ func (m *Mock) AssertNumberOfCalls(t TestingT, methodName string, expectedCalls
 			actualCalls++
 		}
 	}
-	return assert.Equal(t, actualCalls, expectedCalls, fmt.Sprintf("Expected number of calls (%d) does not match the actual number of calls (%d).", expectedCalls, actualCalls))
+	return assert.Equal(t, expectedCalls, actualCalls, fmt.Sprintf("Expected number of calls (%d) does not match the actual number of calls (%d).", expectedCalls, actualCalls))
 }
 
 // AssertCalled asserts that the method was called.