diff --git a/rules/strlen-empty-str.xml b/rules/strlen-empty-str.xml
new file mode 100644
index 000000000..eb45ccfdc
--- /dev/null
+++ b/rules/strlen-empty-str.xml
@@ -0,0 +1,9 @@
+
+
+ if \( ([!] )*?(strlen) \( \w+? \) ([>] [0] )*?\) {
+
+ StrlenEmptyString
+ performance
+ Using strlen() to check if a string is empty is not efficient.
+
+
diff --git a/rules/unused-deref.xml b/rules/unused-deref.xml
new file mode 100644
index 000000000..b0e7dd442
--- /dev/null
+++ b/rules/unused-deref.xml
@@ -0,0 +1,9 @@
+
+
+ [;{}] [*] \w+? (\+\+|\-\-) ;
+
+ UnusedDeref
+ style
+ Redundant * found, "*p++" is the same as "*(p++)".
+
+