Index: gwlib/charset.c
===================================================================
RCS file: /home/cvs/gateway/gwlib/charset.c,v
retrieving revision 1.30
diff -u -w -b -B -r1.30 charset.c
--- gwlib/charset.c	1 Mar 2009 23:09:32 -0000	1.30
+++ gwlib/charset.c	2 Mar 2009 03:53:03 -0000
@@ -69,6 +69,12 @@
 #include <iconv.h>
 #endif
 
+#if defined(__APPLE__) || defined(OPENBSD)
+#define ICONV_CONST const
+#else
+#define ICONV_CONST
+#endif
+
 /* Code used for non-representable characters */
 #define NRP '?'
 
@@ -616,7 +622,7 @@
     pointer = to_buf = gw_malloc(outbytesleft);
 
     do {
-        ret = iconv(cd, &from_buf, &inbytesleft, &pointer, &outbytesleft);
+        ret = iconv(cd, (ICONV_CONST char**)&from_buf, &inbytesleft, &pointer, &outbytesleft);
         if(ret == -1) {
             long tmp;
             /* the conversion failed somewhere */