Index: src/OFHash.h
==================================================================
--- src/OFHash.h
+++ src/OFHash.h
@@ -64,14 +64,14 @@
  * The size of the buffer depends on the hash used. The buffer is part of the
  * receiver's memory pool.
  *
  * \return A buffer containing the hash
  */
-- (uint8_t*)digest;
+- (uint8_t*)digest OF_RETURNS_INNER_POINTER;
 
 /**
  * \brief Returns a boolean whether the hash has already been calculated.
  *
  * \return A boolean whether the hash has already been calculated
  */
 - (BOOL)isCalculated;
 @end

Index: src/runtime/runtime.h
==================================================================
--- src/runtime/runtime.h
+++ src/runtime/runtime.h
@@ -218,13 +218,15 @@
 {
 	return class_getName(object_getClass(obj));
 }
 
 static inline BOOL
-class_isMetaClass(Class cls)
+class_isMetaClass(Class cls_)
 {
+	struct objc_class *cls = cls_;
+
 	return (cls->info & OBJC_CLASS_INFO_METACLASS);
 }
 
 #undef OBJC_BRIDGE
 
 #endif