diff --git a/lib/primesieve/include/primesieve/popcnt.hpp b/lib/primesieve/include/primesieve/popcnt.hpp
index c81b9f38..c040cb70 100644
--- a/lib/primesieve/include/primesieve/popcnt.hpp
+++ b/lib/primesieve/include/primesieve/popcnt.hpp
@@ -28,10 +28,10 @@ namespace {
 ///
 inline uint64_t popcnt64_bitwise(uint64_t x)
 {
-  uint64_t m1 = 0x5555555555555555ll;
-  uint64_t m2 = 0x3333333333333333ll;
-  uint64_t m4 = 0x0F0F0F0F0F0F0F0Fll;
-  uint64_t h01 = 0x0101010101010101ll;
+  uint64_t m1 = 0x5555555555555555ull;
+  uint64_t m2 = 0x3333333333333333ull;
+  uint64_t m4 = 0x0F0F0F0F0F0F0F0Full;
+  uint64_t h01 = 0x0101010101010101ull;
 
   x -= (x >> 1) & m1;
   x = (x & m2) + ((x >> 2) & m2);