diff --git a/epan/addr_resolv.c b/epan/addr_resolv.c
index 1837241fdc..d8f0421e37 100644
--- a/epan/addr_resolv.c
+++ b/epan/addr_resolv.c
@@ -3059,7 +3059,7 @@ get_eui64_name(const guint64 addr_eui64)
   guint8 *addr = ep_alloc(8);
   
   /* Copy and convert the address to network byte order. */
-  *(guint64 *)(addr) = pntoh64(&(addr_eui64));
+  *(guint64 *)(void *)(addr) = pntoh64(&(addr_eui64));
 
   if ((gbl_resolv_flags & RESOLV_MAC) && !eth_resolution_initialized) {
     initialize_ethers();
@@ -3084,7 +3084,7 @@ get_eui64_name_if_known(const guint64 addr_eui64)
   guint8 *addr = ep_alloc(8);
 
   /* Copy and convert the address to network byte order. */
-  *(guint64 *)(addr) = pntoh64(&(addr_eui64));
+  *(guint64 *)(void *)(addr) = pntoh64(&(addr_eui64));
 
   if (!eth_resolution_initialized) {
     initialize_ethers();
diff --git a/epan/address_to_str.c b/epan/address_to_str.c
index 16831ee68d..8ee7b0e50e 100644
--- a/epan/address_to_str.c
+++ b/epan/address_to_str.c
@@ -334,7 +334,7 @@ eui64_to_str(const guint64 ad) {
   buf=ep_alloc(EUI64_STR_LEN);
 
   /* Copy and convert the address to network byte order. */
-  *(guint64 *)(p_eui64) = pntoh64(&(ad));
+  *(guint64 *)(void *)(p_eui64) = pntoh64(&(ad));
 
   sprintf(buf, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", 
   p_eui64[0], p_eui64[1], p_eui64[2], p_eui64[3],
diff --git a/epan/ftypes/ftype-integer.c b/epan/ftypes/ftype-integer.c
index 60a10e21da..38cd8d3cc0 100644
--- a/epan/ftypes/ftype-integer.c
+++ b/epan/ftypes/ftype-integer.c
@@ -528,7 +528,7 @@ eui64_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
   	guint8 *p_eui64 = ep_alloc(8);
 
   	/* Copy and convert the address to network byte order. */
-  	*(guint64 *)(p_eui64) = pntoh64(&(fv->value.integer64));
+  	*(guint64 *)(void *)(p_eui64) = pntoh64(&(fv->value.integer64));
 
 	sprintf(buf, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", 
 	p_eui64[0], p_eui64[1], p_eui64[2], p_eui64[3],