diff --git a/cwe.l b/cwe.l
new file mode 100644
index 0000000..8383dfd
--- /dev/null
+++ b/cwe.l
@@ -0,0 +1,29 @@
+%{
+
+/* cwe by David A. Wheeler (http://www.dwheeler.com).
+   This prints anything of the form CWE-#
+*/
+
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+
+void out(char *text) {
+	fputs(text,stdout);
+}
+
+void outchar(char c) {
+	fputc(c, stdout);
+}
+
+
+%}
+
+
+%%
+CWE-[1-9][0-9]* { out(yytext); outchar('\n'); }
+.               { }
+\n              { }
+
+%%
+
diff --git a/makefile b/makefile
index 9e76193..ac9bb18 100644
--- a/makefile
+++ b/makefile
@@ -147,6 +147,13 @@ my_install: flawfinder.pdf flawfinder.ps
 	      test.c test2.c test-results.txt test-results.html \
 	           /home/dwheeler/dwheeler.com/flawfinder
 
+# This is intended to be a local capability to list CWEs
+show-cwes:
+	flex -o cwe.c cwe.l
+	gcc -o cwe cwe.c -lfl
+	./cwe < flawfinder | sort -u
+
+
 .PHONY: install clean test check profile test-is-correct rpm uninstall distribute