diff --git a/include/boost/cstdint.hpp b/include/boost/cstdint.hpp
index 38f61fe..31b917d 100644
--- a/include/boost/cstdint.hpp
+++ b/include/boost/cstdint.hpp
@@ -253,7 +253,7 @@ Added 23rd September (John Maddock).
 
 //  64-bit types + intmax_t and uintmax_t  ----------------------------------//
 
-#  if (defined(ULLONG_MAX) || defined(ULONG_LONG_MAX)) && !(defined(__CYGWIN__) || defined(__CYGWIN32__))
+#  if (defined(ULLONG_MAX) || defined(ULONG_LONG_MAX))
 #    if(defined(ULLONG_MAX) && ULLONG_MAX == 18446744073709551615) ||  \
         (defined(ULONG_LONG_MAX) && ULONG_LONG_MAX == 18446744073709551615)
 #       define INT64_C(value) value##LL
@@ -298,3 +298,4 @@ Added 23rd September (John Maddock).
 # undef UINTMAX_C
 
 #endif // __STDC_CONSTANT_MACROS_DEFINED etc.
+