diff --git a/ChangeLog b/ChangeLog
index 9cfac98d2..7677697ec 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2010-11-04  Robert Larice
+ * src/main.c ,
+ * src/ngsconvert.c ,
+ * src/frontend/aspice.c ,
+ * src/frontend/inp.c ,
+ * src/frontend/nutinp.c :
+    use `size_t' variables for fread/fwrite operations
+
 2010-11-02  Robert Larice
  * src/frontend/numparam/general.h ,
  * src/frontend/numparam/mystring.c ,
diff --git a/src/frontend/aspice.c b/src/frontend/aspice.c
index fedbb83f0..afd724ecb 100644
--- a/src/frontend/aspice.c
+++ b/src/frontend/aspice.c
@@ -263,7 +263,7 @@ com_rspice(wordlist *wl)
     char *outfile;
     FILE *inp, *serv, *out, *srv_input, *err_outp;
     struct plot *pl;
-    int i;
+    size_t n;
     int to_serv[2], from_serv[2], err_serv[2];
     int pid;
     long	pos;
@@ -342,9 +342,9 @@ com_rspice(wordlist *wl)
                 wl = wl->wl_next;
                 continue;   /* Should be careful */
             }
-            while ((i = fread(buf, 1, BSIZE_SP, inp)) > 0)
+            while ((n = fread(buf, 1, BSIZE_SP, inp)) > 0)
 		(void) fwrite(buf, 1, strlen(buf), srv_input);
-                /* (void) write(s, buf, i); */
+                /* (void) write(s, buf, n); */
             wl = wl->wl_next;
 	    fclose(inp);
         }
@@ -376,8 +376,8 @@ com_rspice(wordlist *wl)
     }
     if (p)
 	fputs(buf, out);
-    while ((i = fread(buf, 1, BSIZE_SP, serv))) {
-        (void) fwrite(buf, 1, i, out);
+    while ((n = fread(buf, 1, BSIZE_SP, serv))) {
+        (void) fwrite(buf, 1, n, out);
     }
     /* We hope that positioning info + error messages < pipe size */
     while (fgets(buf, BSIZE_SP, err_outp)) {
diff --git a/src/frontend/inp.c b/src/frontend/inp.c
index 0d343718f..a4928c0d2 100644
--- a/src/frontend/inp.c
+++ b/src/frontend/inp.c
@@ -1043,7 +1043,7 @@ com_source(wordlist *wl)
    char *tempfile = NULL;
    
    wordlist *owl = wl;
-   int i;
+   size_t n;
 
    inter = cp_interactive;
    cp_interactive = FALSE;
@@ -1063,8 +1063,8 @@ com_source(wordlist *wl)
             unlink(tempfile);
             return;
          }
-         while ((i = fread(buf, 1, BSIZE_SP, tp)) > 0)
-            fwrite(buf, 1, i, fp);
+         while ((n = fread(buf, 1, BSIZE_SP, tp)) > 0)
+            fwrite(buf, 1, n, fp);
             fclose(tp);
             wl = wl->wl_next;
       }
diff --git a/src/frontend/nutinp.c b/src/frontend/nutinp.c
index c5ccf8193..701a136a3 100644
--- a/src/frontend/nutinp.c
+++ b/src/frontend/nutinp.c
@@ -205,7 +205,7 @@ nutcom_source(wordlist *wl)
     bool inter;
     char *tempfile = NULL;
     wordlist *owl = wl;
-    int i;
+    size_t n;
 
     inter = cp_interactive;
     cp_interactive = FALSE;
@@ -225,8 +225,8 @@ nutcom_source(wordlist *wl)
                 (void) unlink(tempfile);
                 return;
             }
-            while ((i = fread(buf, 1, BSIZE_SP, tp)) > 0)
-                (void) fwrite(buf, 1, i, fp);
+            while ((n = fread(buf, 1, BSIZE_SP, tp)) > 0)
+                (void) fwrite(buf, 1, n, fp);
             (void) fclose(tp);
             wl = wl->wl_next;
         }
diff --git a/src/main.c b/src/main.c
index 12de56a91..39947b50e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -622,10 +622,10 @@ static void
 append_to_stream(FILE *dest, FILE *source)
 {
     char buf[BSIZE_SP];
-    int i;
+    size_t n;
 
-    while ((i = fread(buf, 1, BSIZE_SP, source)) > 0)
-      fwrite(buf, i, 1, dest);
+    while ((n = fread(buf, 1, BSIZE_SP, source)) > 0)
+      fwrite(buf, n, 1, dest);
 }
 #endif /* SIMULATOR */
 
diff --git a/src/ngsconvert.c b/src/ngsconvert.c
index fe727d6c3..f899327f6 100644
--- a/src/ngsconvert.c
+++ b/src/ngsconvert.c
@@ -323,7 +323,7 @@ main(int ac, char **av)
     char buf[BSIZE_SP];
     char t, f;
     struct plot *pl;
-    int i;
+    size_t n;
     char *infile = NULL;
     char *outfile = NULL;
     FILE *fp;
@@ -352,8 +352,8 @@ main(int ac, char **av)
                 perror(infile);
                 exit(EXIT_BAD);
             }
-            while ((i = fread(buf, 1, sizeof(buf), stdin)))
-                (void) fwrite(buf, 1, i, fp);
+            while ((n = fread(buf, 1, sizeof(buf), stdin)))
+                (void) fwrite(buf, 1, n, fp);
             (void) fclose(fp);
             break;
 
@@ -424,8 +424,8 @@ main(int ac, char **av)
             perror(outfile);
             exit(EXIT_BAD);
         }
-        while ((i = fread(buf, 1, sizeof(buf), fp)))
-            (void) fwrite(buf, 1, i, stdout);
+        while ((n = fread(buf, 1, sizeof(buf), fp)))
+            (void) fwrite(buf, 1, n, stdout);
         (void) fclose(fp);
         (void) unlink(infile);
         (void) unlink(outfile);