Index: src/OFMD5Hash.m
==================================================================
--- src/OFMD5Hash.m
+++ src/OFMD5Hash.m
@@ -187,10 +187,11 @@
 
 	_buffer.words[14] = OF_BSWAP32_IF_BE((uint32_t)(_bits & 0xFFFFFFFF));
 	_buffer.words[15] = OF_BSWAP32_IF_BE((uint32_t)(_bits >> 32));
 
 	processBlock(_state, _buffer.words);
+	memset(&_buffer, 0, sizeof(_buffer));
 	byteSwapVectorIfBE(_state, 4);
 	_calculated = true;
 
 	return (const uint8_t*)_state;
 }

Index: src/OFSHA1Hash.m
==================================================================
--- src/OFSHA1Hash.m
+++ src/OFSHA1Hash.m
@@ -160,10 +160,11 @@
 
 	_buffer.words[14] = OF_BSWAP32_IF_LE((uint32_t)(_bits >> 32));
 	_buffer.words[15] = OF_BSWAP32_IF_LE((uint32_t)(_bits & 0xFFFFFFFF));
 
 	processBlock(_state, _buffer.words);
+	memset(&_buffer, 0, sizeof(_buffer));
 	byteSwapVectorIfLE(_state, 5);
 	_calculated = true;
 
 	return (const uint8_t*)_state;
 }