Index: src/OFArray.m
==================================================================
--- src/OFArray.m
+++ src/OFArray.m
@@ -372,11 +372,11 @@
 {
 	self = [super init];
 
 	array = array_;
 	count = [array_ count];
-	mutations = *mutationsPtr_;
+	mutations = (mutationsPtr_ != NULL ? *mutationsPtr_ : 0);
 	mutationsPtr = mutationsPtr_;
 
 	return self;
 }
 

Index: src/OFDictionary.m
==================================================================
--- src/OFDictionary.m
+++ src/OFDictionary.m
@@ -688,11 +688,11 @@
 {
 	self = [super init];
 
 	data = data_;
 	size = size_;
-	mutations = *mutationsPtr_;
+	mutations = (mutationsPtr_ != NULL ? *mutationsPtr_ : 0);
 	mutationsPtr = mutationsPtr_;
 
 	return self;
 }