Index: src/OFMutableArray.h
==================================================================
--- src/OFMutableArray.h
+++ src/OFMutableArray.h
@@ -123,7 +123,7 @@
  * \brief Converts the mutable array to an immutable array.
  */
 - (void)makeImmutable;
 @end
 
-@interface OFMutableArrayPlaceholder: OFMutableArray
+@interface OFMutableArray_placeholder: OFMutableArray
 @end

Index: src/OFMutableArray.m
==================================================================
--- src/OFMutableArray.m
+++ src/OFMutableArray.m
@@ -31,11 +31,11 @@
 
 static struct {
 	Class isa;
 } placeholder;
 
-@implementation OFMutableArrayPlaceholder
+@implementation OFMutableArray_placeholder
 - init
 {
 	return (id)[[OFMutableArray_adjacent alloc] init];
 }
 
@@ -111,11 +111,11 @@
 
 @implementation OFMutableArray
 + (void)initialize
 {
 	if (self == [OFMutableArray class])
-		placeholder.isa = [OFMutableArrayPlaceholder class];
+		placeholder.isa = [OFMutableArray_placeholder class];
 }
 
 + alloc
 {
 	if (self == [OFMutableArray class])