--- wiretap/catapult_dct2000.c
+++ wiretap/catapult_dct2000.c
@@ -578,6 +578,7 @@
     guint32 n;
     line_prefix_info_t *prefix = NULL;
     gchar time_string[16];
+    size_t wr;
 
     /******************************************************/
     /* Look up the file_externals structure for this file */
@@ -592,14 +593,14 @@
         wdh->dump.dct2000 = g_malloc(sizeof(catapult_dct2000_t));
 
         /* Write out saved first line */
-        fwrite(file_externals->firstline, 1, file_externals->firstline_length, wdh->fh);
-        fwrite("\n", 1, 1, wdh->fh);
+        wr = fwrite(file_externals->firstline, 1, file_externals->firstline_length, wdh->fh);
+        wr = fwrite("\n", 1, 1, wdh->fh);
 
         /* Also write out saved second line with timestamp corresponding to the
            opening time of the log.
         */
-        fwrite(file_externals->secondline, 1, file_externals->secondline_length, wdh->fh);
-        fwrite("\n", 1, 1, wdh->fh);
+        wr = fwrite(file_externals->secondline, 1, file_externals->secondline_length, wdh->fh);
+        wr = fwrite("\n", 1, 1, wdh->fh);
 
         /* Allocate the dct2000-specific dump structure */
         wdh->dump.dct2000 = g_malloc(sizeof(catapult_dct2000_t));
@@ -623,7 +624,7 @@
                                                       (const void*)&(pseudo_header->dct2000.seek_off));
 
     /* Write out text before timestamp */
-    fwrite(prefix->before_time, 1, strlen(prefix->before_time), wdh->fh);
+    wr = fwrite(prefix->before_time, 1, strlen(prefix->before_time), wdh->fh);
 
     /* Calculate time of this packet to write, relative to start of dump */
     if (phdr->ts.nsecs >= wdh->dump.dct2000->start_time.nsecs)
@@ -640,16 +641,16 @@
     }
 
     /* Write out the calculated timestamp */
-    fwrite(time_string, 1, strlen(time_string), wdh->fh);
+    wr = fwrite(time_string, 1, strlen(time_string), wdh->fh);
 
     /* Write out text between timestamp and start of hex data */
     if (prefix->after_time == NULL)
     {
-        fwrite(" l ", 1, strlen(" l "), wdh->fh);
+        wr = fwrite(" l ", 1, strlen(" l "), wdh->fh);
     }
     else
     {
-        fwrite(prefix->after_time, 1, strlen(prefix->after_time), wdh->fh);
+        wr = fwrite(prefix->after_time, 1, strlen(prefix->after_time), wdh->fh);
     }
 
 
@@ -685,7 +686,7 @@
 
     /**************************************/
     /* Remainder is encapsulated protocol */
-    fwrite("$", 1, 1, wdh->fh);
+    wr = fwrite("$", 1, 1, wdh->fh);
 
     /* Each binary byte is written out as 2 hex string chars */ 
     for (; n < phdr->len; n++)
@@ -695,11 +696,11 @@
         c[1] = char_from_hex((guchar)(pd[n] & 0x0f));
 
         /* Write both hex chars of byte together */
-        fwrite(c, 1, 2, wdh->fh);
+        wr = fwrite(c, 1, 2, wdh->fh);
     }
 
     /* End the line */
-    fwrite("\n", 1, 1, wdh->fh);
+    wr = fwrite("\n", 1, 1, wdh->fh);
 
     return TRUE;
 }
--- wiretap/k12.c
+++ wiretap/k12.c
@@ -724,20 +724,21 @@
 static const gchar dumpy_junk[] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
 
 static void k12_dump_record(wtap_dumper *wdh, long len,  guint8* buffer) {
+    size_t wr;
     long junky_offset = (0x2000 - ( (wdh->dump.k12->file_offset - 0x200) % 0x2000 )) % 0x2000;
     
     if (len > junky_offset) {
         
         if (junky_offset)
-            fwrite(buffer, 1, junky_offset, wdh->fh);
+            wr = fwrite(buffer, 1, junky_offset, wdh->fh);
         
-        fwrite(dumpy_junk, 1, 0x10, wdh->fh);
+        wr = fwrite(dumpy_junk, 1, 0x10, wdh->fh);
         
-        fwrite(buffer+junky_offset, 1, len - junky_offset, wdh->fh);
+        wr = fwrite(buffer+junky_offset, 1, len - junky_offset, wdh->fh);
         
         wdh->dump.k12->file_offset += len + 0x10;
     } else {
-        fwrite(buffer, 1, len, wdh->fh);
+        wr = fwrite(buffer, 1, len, wdh->fh);
         wdh->dump.k12->file_offset += len;
     }
     
@@ -900,12 +901,13 @@
 static const guint8 k12_eof[] = {0xff,0xff};
 
 static gboolean k12_dump_close(wtap_dumper *wdh, int *err) {
+    size_t wr;
     union {
         guint8 b[sizeof(guint32)];
         guint32 u;
     } d;
     
-    fwrite(k12_eof, 1, 2, wdh->fh);
+    wr = fwrite(k12_eof, 1, 2, wdh->fh);
     
     if (fseek(wdh->fh, 8, SEEK_SET) == -1) {
         *err = errno;
@@ -914,11 +918,11 @@
     
     d.u = g_htonl(wdh->dump.k12->file_len);
     
-    fwrite(d.b, 1, 4, wdh->fh);
+    wr = fwrite(d.b, 1, 4, wdh->fh);
     
     d.u = g_htonl(wdh->dump.k12->num_of_records);
     
-    fwrite(d.b, 1, 4, wdh->fh);
+    wr = fwrite(d.b, 1, 4, wdh->fh);
     
     return TRUE;
 }