diff --git a/math/finding_number_of_digits_in_a_number.cpp b/math/finding_number_of_digits_in_a_number.cpp
index dac147c5e..ec870b80c 100644
--- a/math/finding_number_of_digits_in_a_number.cpp
+++ b/math/finding_number_of_digits_in_a_number.cpp
@@ -59,7 +59,7 @@ uint64_t count_digits(uint64_t n) {
     //handling the value 0
      return 0;    
     }
-    uint64_t count = floor(log10(n) + 1);
+    uint64_t count = floor(log10(uint64_t(n)) + 1);
 
     return count;
 }