diff --git a/ex1/ABCEFG/skalar_stl/mylib.h b/ex1/ABCEFG/skalar_stl/mylib.h
index 7540de4..88fd6a2 100644
--- a/ex1/ABCEFG/skalar_stl/mylib.h
+++ b/ex1/ABCEFG/skalar_stl/mylib.h
@@ -59,7 +59,7 @@ void fill_vector(istream& istr, vector<double>& v);
 long int sum_of_spec(int n);
 
 // Sums up all positive integers less or equal n which are multiples of 3 or of 5 (including or!) by inclusion-exclusion principle. 
-double formula(long int n);
+double formula(int n);
 
 // -------------- Task E --------------