diff --git a/lld/ELF/Writer.cpp b/lld/ELF/Writer.cpp
index 24e74e654b0a..5dc04c2995f6 100644
--- a/lld/ELF/Writer.cpp
+++ b/lld/ELF/Writer.cpp
@@ -29,8 +29,10 @@ using namespace lld::elf2;
 
 static const int PageSize = 4096;
 
-// On linux x86_64 mmap of the first 15 pages fails, so the smallest value
-// that can be used in here is 0x10000.
+// On freebsd x86_64 the first page cannot be mmaped.
+// On linux that is controled by vm.mmap_min_addr. At least on some x86_64
+// installs that is 65536, so the first 15 pages cannot be used.
+// Given that, the smallest value that can be used in here is 0x10000.
 // If using 2MB pages, the smallest page aligned address that works is
 // 0x200000, but it looks like every OS uses 4k pages for executables.
 // FIXME: This is architecture and OS dependent.