diff --git a/client/util.c b/client/util.c
index 2bfa5d40..d7c824d9 100644
--- a/client/util.c
+++ b/client/util.c
@@ -272,16 +272,6 @@ uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockS
 	return tmp;
 }
 
-// takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64), 
-// returns: the dest array contains the reordered src array.
-void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
-	for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
-		for (size_t i = 0; i < blockSize; i++){
-			dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
-		}
-	}
-}
-
 //assumes little endian
 char * printBits(size_t const size, void const * const ptr)
 {
diff --git a/client/util.h b/client/util.h
index e8ae6b04..31ad29fb 100644
--- a/client/util.h
+++ b/client/util.h
@@ -61,7 +61,6 @@ extern char *printBits(size_t const size, void const * const ptr);
 extern char * printBitsPar(const uint8_t *b, size_t len);
 extern uint32_t SwapBits(uint32_t value, int nrbits);
 extern uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize);
-extern void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest);
 
 extern int param_getlength(const char *line, int paramnum);
 extern char param_getchar(const char *line, int paramnum);