diff --git a/cmuratori/hero/code/code508.hmml b/cmuratori/hero/code/code508.hmml
index 065f152..0c68fac 100644
--- a/cmuratori/hero/code/code508.hmml
+++ b/cmuratori/hero/code/code508.hmml
@@ -21,7 +21,7 @@
     page="HandmadeHero / cpp / Linux updates"
     url=https://github.com/HandmadeHero/cpp/issues/65]][:"platform layer" :research]
 [19:59][Rename various struct members so they don't clash with system definitions of Linux][:"platform layer"]
-[21:31][Understanding Linux's mmap() in contrast to VirtualFree[ref
+[21:31][Understanding Linux's mmap() in contrast to Windows' VirtualFree()[ref
     site="Windows Dev Center"
     page="VirtualFree function"
     url=https://msdn.microsoft.com/en-us/library/windows/desktop/aa366892.aspx]][:memory :speech]