diff --git a/src/lint/linter/xhpast/rules/ArcanistDeprecationXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistDeprecationXHPASTLinterRule.php
--- a/src/lint/linter/xhpast/rules/ArcanistDeprecationXHPASTLinterRule.php
+++ b/src/lint/linter/xhpast/rules/ArcanistDeprecationXHPASTLinterRule.php
@@ -28,7 +28,10 @@
   public function setLinterConfigurationValue($key, $value) {
     switch ($key) {
       case 'xhpast.deprecated.functions':
-        $this->deprecatedFunctions = $value;
+        $this->deprecatedFunctions = array();
+        foreach ($value as $name => $message) {
+          $this->deprecatedFunctions[strtolower($name)] = $message;
+        }
         return;
 
       default:
@@ -38,6 +41,7 @@
 
   public function process(XHPASTNode $root) {
     $map = $this->deprecatedFunctions;
+
     $function_calls = $this->getFunctionCalls($root, array_keys($map));
 
     foreach ($function_calls as $call) {
diff --git a/src/lint/linter/xhpast/rules/__tests__/deprecation/deprecated-function.lint-test b/src/lint/linter/xhpast/rules/__tests__/deprecation/deprecated-function.lint-test
--- a/src/lint/linter/xhpast/rules/__tests__/deprecation/deprecated-function.lint-test
+++ b/src/lint/linter/xhpast/rules/__tests__/deprecation/deprecated-function.lint-test
@@ -1,6 +1,6 @@
 <?php
 
-deprecated_function();
+DeprecatedFunction();
 modern_function();
 ~~~~~~~~~~
 warning:3:1
@@ -9,7 +9,7 @@
 {
   "config": {
     "xhpast.deprecated.functions": {
-      "deprecated_function": "This function is deprecated."
+      "DeprecatedFunction": "This function is deprecated."
     }
   }
 }
diff --git a/src/lint/linter/xhpast/rules/__tests__/deprecation/deprecated-static-method.lint-test b/src/lint/linter/xhpast/rules/__tests__/deprecation/deprecated-static-method.lint-test
new file mode 100644
--- /dev/null
+++ b/src/lint/linter/xhpast/rules/__tests__/deprecation/deprecated-static-method.lint-test
@@ -0,0 +1,15 @@
+<?php
+
+MyLib::deprecatedMethod();
+MyLib::nonDeprecatedMethod();
+~~~~~~~~~~
+warning:3:1
+~~~~~~~~~~
+~~~~~~~~~~
+{
+  "config": {
+    "xhpast.deprecated.functions": {
+      "MyLib::deprecatedMethod": "This static method is deprecated."
+    }
+  }
+}