diff --git a/CHANGES b/CHANGES
index 9a75def..11977a7 100644
--- a/CHANGES
+++ b/CHANGES
@@ -19,6 +19,9 @@ corrections:
 	OPENSSL-CONNECT with bind option failed on some systems, eg.FreeBSD, with
 	"Invalid argument"
 	Thanks to Emile den Tex for reporting this bug.
+ 
+	Changed some variable definitions to make gcc -O2 aliasing checker happy
+	Thanks to Ilya Gordeev for reporting these warnings
 
 	fixed bug in xio-openssl.c that prevented error handling of bad number
 	of arguments, thanks to Paulik Tamas for reporting
diff --git a/filan.c b/filan.c
index 20ae88e..054c079 100644
--- a/filan.c
+++ b/filan.c
@@ -599,7 +599,10 @@ int sockan(int fd, FILE *outfile) {
       {SO_DETACH_FILTER, "DETACH_FILTER"},
 #endif
       {0, NULL} } ;
-   char optval[FILAN_OPTLEN];
+   union {
+      char c[FILAN_OPTLEN];
+      int  i[FILAN_OPTLEN/sizeof(int)];
+   } optval;
    const struct sockopt *optname;
    union sockaddr_union sockname, peername;	/* the longest I know of */
    socklen_t namelen;
@@ -609,33 +612,33 @@ int sockan(int fd, FILE *outfile) {
 #endif
 
    optlen = FILAN_OPTLEN;
-   result = Getsockopt(fd, SOL_SOCKET, SO_TYPE, optval, &optlen);
+   result = Getsockopt(fd, SOL_SOCKET, SO_TYPE, optval.c, &optlen);
    if (result < 0) {
       Debug4("getsockopt(%d, SOL_SOCKET, SO_TYPE, %p, {"F_socklen"}): %s",
-	     fd, optval, optlen, strerror(errno));
+	     fd, optval.c, optlen, strerror(errno));
    } else {
-      Debug3("fd %d: socket of type %d (\"%s\")", fd, *(int *)optval,
-	  socktypes[*(int *)optval]);
+      Debug3("fd %d: socket of type %d (\"%s\")", fd, *optval.i,
+	  socktypes[*optval.i]);
    }
 
    optname = sockopts; while (optname->so) {
       optlen = FILAN_OPTLEN;
       result =
-	 Getsockopt(fd, SOL_SOCKET, optname->so, (void *)optval, &optlen);
+	 Getsockopt(fd, SOL_SOCKET, optname->so, (void *)optval.c, &optlen);
       if (result < 0) {
 	 Debug5("getsockopt(%d, SOL_SOCKET, %d, %p, {"F_socklen"}): %s",
-		fd, optname->so, optval, optlen, strerror(errno));
+		fd, optname->so, optval.c, optlen, strerror(errno));
 	 fputc('\t', outfile);
       } else if (optlen == sizeof(int)) {
 	 Debug2("getsockopt(,,, {%d}, %d)",
-	     *(int *)optval, optlen);
-	 /*Info2("%s: %d", optname->name, *(int *)optval);*/
-	 fprintf(outfile, "%s=%d\t", optname->name, *(int *)optval);
+	     *optval.i, optlen);
+	 /*Info2("%s: %d", optname->name, *optval.i);*/
+	 fprintf(outfile, "%s=%d\t", optname->name, *optval.i);
       } else {
 	 Debug3("getsockopt(,,, {%d,%d}, %d)",
-	     ((int *)optval)[0], ((int *)optval)[1], optlen);
+	     optval.i[0], optval.i[1], optlen);
 	 fprintf(outfile, "%s={%d,%d}\t", optname->name,
-		 ((int *)optval)[0], ((int *)optval)[1]);
+		 optval.i[0], optval.i[1]);
       }
       ++optname;
    }
@@ -890,16 +893,19 @@ int tcpan(int fd, FILE *outfile) {
 #if _WITH_SOCKET
 int sockoptan(int fd, const struct sockopt *optname, int socklay, FILE *outfile) {
 #define FILAN_OPTLEN 256
-   char optval[FILAN_OPTLEN];
+   union {
+      char c[FILAN_OPTLEN];
+      char i[FILAN_OPTLEN/sizeof(int)];
+   } optval;
    socklen_t optlen;
    int result;
 
    optlen = FILAN_OPTLEN;
    result =
-      Getsockopt(fd, socklay, optname->so, (void *)optval, &optlen);
+      Getsockopt(fd, socklay, optname->so, (void *)optval.c, &optlen);
    if (result < 0) {
       Debug6("getsockopt(%d, %d, %d, %p, {"F_socklen"}): %s",
-	     fd, socklay, optname->so, optval, optlen, strerror(errno));
+	     fd, socklay, optname->so, optval.c, optlen, strerror(errno));
       fputc('\t', outfile);
       return -1;
    } else if (optlen == 0) {
@@ -907,13 +913,13 @@ int sockoptan(int fd, const struct sockopt *optname, int socklay, FILE *outfile)
       fprintf(outfile, "%s=\"\"\t", optname->name);
    } else if (optlen == sizeof(int)) {
       Debug2("getsockopt(,,, {%d}, %d)",
-	     *(int *)optval, optlen);
-      fprintf(outfile, "%s=%d\t", optname->name, *(int *)optval);
+	     *optval.i, optlen);
+      fprintf(outfile, "%s=%d\t", optname->name, *optval.i);
    } else {
       char outbuf[FILAN_OPTLEN*9+128], *cp = outbuf;
       int i;
       for (i = 0; i < optlen/sizeof(unsigned int); ++i) {
-	 cp += sprintf(cp, "%08x ", ((unsigned int *)optval)[i]);
+	 cp += sprintf(cp, "%08x ", (unsigned int)optval.i[i]);
       }
       *--cp = '\0';	/* delete trailing space */
       Debug2("getsockopt(,,, {%s}, %d)", outbuf, optlen);
diff --git a/procan-cdefs.c b/procan-cdefs.c
index 9e401c7..2e4d41a 100644
--- a/procan-cdefs.c
+++ b/procan-cdefs.c
@@ -20,7 +20,7 @@ int procan_cdefs(FILE *outfile) {
    fprintf(outfile, "#define FD_SETSIZE %u\n", FD_SETSIZE);
 #endif
 #ifdef NFDBITS
-   fprintf(outfile, "#define NFDBITS %u\n", (unsigned int)NFDBITS);
+   fprintf(outfile, "#define NFDBITS %d\n", NFDBITS);
 #endif
 #ifdef O_RDONLY
    fprintf(outfile, "#define O_RDONLY %u\n", O_RDONLY);
diff --git a/xio-ip6.c b/xio-ip6.c
index 6ca44a1..36c5ac5 100644
--- a/xio-ip6.c
+++ b/xio-ip6.c
@@ -230,7 +230,10 @@ int xiolog_ancillary_ip6(struct cmsghdr *cmsg, int *num,
    case IPV6_HOPLIMIT:
       strncpy(typbuff, "IPV6_HOPLIMIT", typlen);
       strncpy(nambuff, "hoplimit", namlen);
-      snprintf(valbuff, vallen, "%d", *(int *)CMSG_DATA(cmsg));
+      {
+	 int *intp = (int *)CMSG_DATA(cmsg);
+	 snprintf(valbuff, vallen, "%d", *intp);
+      }
       return STAT_OK;
 #endif /* defined(IPV6_HOPLIMIT) */
 #ifdef IPV6_RTHDR