diff --git a/Recipe b/Recipe
index 255c4cb1..cb6f1883 100644
--- a/Recipe
+++ b/Recipe
@@ -42,10 +42,6 @@
 #      will run fine on Win95-series OSes where there is no access
 #      control anyway).
 #
-#      Note that this definition is always enabled in the Cygwin
-#      build, since at the time of writing this <aclapi.h> is known
-#      not to be available in Cygwin.
-#
 #  - COMPAT=/DNO_MULTIMON
 #      Disables PuTTY's use of <multimon.h>, which is not available
 #      with some development environments. This means that PuTTY's
diff --git a/mkfiles.pl b/mkfiles.pl
index 422b8b0e..dfb025c1 100755
--- a/mkfiles.pl
+++ b/mkfiles.pl
@@ -311,7 +311,7 @@ print
 "# RCINC = --include-dir c:\\cygwin\\include\\\n".
 "\n".
 &splitline("CFLAGS = -mno-cygwin -Wall -O2 -D_WINDOWS -DDEBUG -DWIN32S_COMPAT".
-  " -DNO_SECURITY -D_NO_OLDNAMES -DNO_MULTIMON -I.")."\n".
+  " -D_NO_OLDNAMES -DNO_MULTIMON -I.")."\n".
 "LDFLAGS = -mno-cygwin -s\n".
 &splitline("RCFLAGS = \$(RCINC) --define WIN32=1 --define _WIN32=1".
   " --define WINVER=0x0400 --define MINGW32_FIX=1")."\n".