diff --git a/CHANGES b/CHANGES
index f355038..20a502f 100644
--- a/CHANGES
+++ b/CHANGES
@@ -123,6 +123,9 @@ porting:
 	Lion 7.1); thanks to Jerry Jacobs to reporting this problem and
 	proposing a solution
 
+	fixed compiler warnings on Mac OS X 64bit. Thanks to Guy Harris for
+	providing the patch.
+
 ####################### V 2.0.0-b7:
 
 security:
diff --git a/filan.c b/filan.c
index 6461e47..6a38fae 100644
--- a/filan.c
+++ b/filan.c
@@ -1,5 +1,5 @@
 /* source: filan.c */
-/* Copyright Gerhard Rieger 2001-2008 */
+/* Copyright Gerhard Rieger 2001-2012 */
 /* Published under the GNU General Public License V.2, see file COPYING */
 
 /* the subroutine filan makes a "FILe descriptor ANalysis". It checks the
@@ -490,7 +490,10 @@ int cdevan(int fd, FILE *outfile) {
 	 return -1;
       }
       fprintf(outfile, " \tIFLAGS=%08x OFLAGS=%08x CFLAGS=%08x LFLAGS=%08x",
-	      termarg.c_iflag, termarg.c_oflag, termarg.c_cflag, termarg.c_lflag);
+	      (unsigned int)termarg.c_iflag,
+	      (unsigned int)termarg.c_oflag,
+	      (unsigned int)termarg.c_cflag,
+	      (unsigned int)termarg.c_lflag);
 
       /* and the control characters */
       if (filan_rawoutput) {
diff --git a/hostan.c b/hostan.c
index 9977914..02f2774 100644
--- a/hostan.c
+++ b/hostan.c
@@ -1,5 +1,5 @@
 /* source: hostan.c */
-/* Copyright Gerhard Rieger 2006-2008 */
+/* Copyright Gerhard Rieger 2006-2012 */
 /* Published under the GNU General Public License V.2, see file COPYING */
 
 /* the subroutine hostan makes a "HOST ANalysis". It gathers information
@@ -59,7 +59,9 @@ static int iffan(FILE *outfile) {
 
    for (i = 0; i < ic.ifc_len; i += sizeof(struct ifreq)) {
       struct ifreq *ifp = (struct ifreq *)((caddr_t)ic.ifc_req + i);
+#if 0 || defined(SIOCGIFINDEX) /* not NetBSD, OpenBSD */
       struct ifreq ifr;
+#endif
 
 #if 0 || defined(SIOCGIFINDEX)	/* not NetBSD, OpenBSD */
       strcpy(ifr.ifr_name, ifp->ifr_name);
@@ -74,7 +76,7 @@ static int iffan(FILE *outfile) {
       fprintf(outfile, "%2d: %s\n", ifr.ifr_ifindex, ifp->ifr_name);
 #endif /* HAVE_STRUCT_IFREQ_IFR_INDEX */
 #else /* !defined(SIOCGIFINDEX) */
-      fprintf(outfile, "%2d: %s\n", i/sizeof(struct ifreq), ifp->ifr_name);
+      fprintf(outfile, "%2d: %s\n", i/(int)sizeof(struct ifreq), ifp->ifr_name);
 #endif /* defined(SIOCGIFINDEX) */
    }
    Close(s);
diff --git a/xio-ip.c b/xio-ip.c
index bc2da84..8db8f6d 100644
--- a/xio-ip.c
+++ b/xio-ip.c
@@ -454,8 +454,10 @@ int xiolog_ancillary_ip(struct cmsghdr *cmsg, int *num,
    const char *cmsgtype, *cmsgname = NULL, *cmsgenvn = NULL, *cmsgfmt = NULL;
    size_t msglen;
    char scratch1[16];	/* can hold an IPv4 address in ASCII */
+#if WITH_IP4 && defined(IP_PKTINFO) && HAVE_STRUCT_IN_PKTINFO
    char scratch2[16];
    char scratch3[16];
+#endif
 
    msglen = cmsg->cmsg_len-((char *)CMSG_DATA(cmsg)-(char *)cmsg);
    envbuff[0] = '\0';
diff --git a/xio-socket.c b/xio-socket.c
index 9bfadc4..df8bc0f 100644
--- a/xio-socket.c
+++ b/xio-socket.c
@@ -1926,7 +1926,7 @@ xiolog_ancillary_socket(struct cmsghdr *cmsg, int *num,
       cmsgname = "timestamp";
       cmsgenvn = "TIMESTAMP";
       { time_t t = tv->tv_sec; ctime_r(&t, valbuff); }
-      sprintf(strchr(valbuff, '\0')-1/*del \n*/, ", %06ld usecs", tv->tv_usec);
+      sprintf(strchr(valbuff, '\0')-1/*del \n*/, ", %06ld usecs", (long)tv->tv_usec);
       break;
 #endif /* defined(SO_TIMESTAMP) */
       ;