Index: src/OFMD5Hash.m
==================================================================
--- src/OFMD5Hash.m
+++ src/OFMD5Hash.m
@@ -136,10 +136,17 @@
 
 	[self OF_resetState];
 
 	return self;
 }
+
+- (void)dealloc
+{
+	[self reset];
+
+	[super dealloc];
+}
 
 - copy
 {
 	OFMD5Hash *copy = [[OFMD5Hash alloc] init];
 

Index: src/OFRIPEMD160Hash.m
==================================================================
--- src/OFRIPEMD160Hash.m
+++ src/OFRIPEMD160Hash.m
@@ -150,10 +150,17 @@
 
 	[self OF_resetState];
 
 	return self;
 }
+
+- (void)dealloc
+{
+	[self reset];
+
+	[super dealloc];
+}
 
 - copy
 {
 	OFRIPEMD160Hash *copy = [[OFRIPEMD160Hash alloc] init];
 

Index: src/OFSHA1Hash.m
==================================================================
--- src/OFSHA1Hash.m
+++ src/OFSHA1Hash.m
@@ -110,10 +110,17 @@
 
 	[self OF_resetState];
 
 	return self;
 }
+
+- (void)dealloc
+{
+	[self reset];
+
+	[super dealloc];
+}
 
 - copy
 {
 	OFSHA1Hash *copy = [[OFSHA1Hash alloc] init];
 

Index: src/OFSHA224Or256Hash.m
==================================================================
--- src/OFSHA224Or256Hash.m
+++ src/OFSHA224Or256Hash.m
@@ -142,10 +142,17 @@
 		@throw e;
 	}
 
 	return self;
 }
+
+- (void)dealloc
+{
+	[self reset];
+
+	[super dealloc];
+}
 
 - copy
 {
 	OFSHA224Or256Hash *copy = [[[self class] alloc] init];
 

Index: src/OFSHA384Or512Hash.m
==================================================================
--- src/OFSHA384Or512Hash.m
+++ src/OFSHA384Or512Hash.m
@@ -153,10 +153,17 @@
 		@throw e;
 	}
 
 	return self;
 }
+
+- (void)dealloc
+{
+	[self reset];
+
+	[super dealloc];
+}
 
 - copy
 {
 	OFSHA384Or512Hash *copy = [[[self class] alloc] init];
 
@@ -226,11 +233,11 @@
 }
 
 - (void)reset
 {
 	[self OF_resetState];
-	memset(&_bits, 0, sizeof(_bits));
+	memset(_bits, 0, sizeof(_bits));
 	memset(&_buffer, 0, sizeof(_buffer));
 	_bufferLength = 0;
 	_calculated = false;
 }