diff --git a/configure/os/CONFIG_SITE.Common.linux-x86 b/configure/os/CONFIG_SITE.Common.linux-x86
index 19a5794c9..981c133e8 100644
--- a/configure/os/CONFIG_SITE.Common.linux-x86
+++ b/configure/os/CONFIG_SITE.Common.linux-x86
@@ -32,5 +32,11 @@ COMMANDLINE_LIBRARY = READLINE
 # Needs -lcurses (older versions)
 #COMMANDLINE_LIBRARY = READLINE_CURSES
 
+# Optionally specify a specific machine type and/or cpu type.
+# Generate instructions for a specific machine type with -march=<cpu-type>
+# Tune for a specific cpu-type  with -mtune=<cpu-type>
+# Specifying -march=<cpu-type> implies -mtune=<cpu-type>.
+#ARCH_DEP_CFLAGS = -mtune=i686 -march=i686 
 
 OP_SYS_CFLAGS += -g
+