diff --git a/Source/DOH/fio.c b/Source/DOH/fio.c
index 43f6dc3cf..3557b3c37 100644
--- a/Source/DOH/fio.c
+++ b/Source/DOH/fio.c
@@ -77,7 +77,7 @@ static DOH *encode(char *name, DOH *s) {
   fn = (DOH *(*)(DOH *)) Data(handle);
   ns = (*fn) (s);
   assert(pos != -1);
-  Seek(s, pos, SEEK_SET);
+  (void)Seek(s, pos, SEEK_SET);
   if (tmp)
     Delete(tmp);
   return ns;
diff --git a/Source/Preprocessor/cpp.c b/Source/Preprocessor/cpp.c
index 5a7634f91..b6426f5ab 100644
--- a/Source/Preprocessor/cpp.c
+++ b/Source/Preprocessor/cpp.c
@@ -584,7 +584,7 @@ static List *find_args(String *s, int ismacro, String *macro_name) {
   if (c != '(') {
     /* Not a macro, bail out now! */
     assert(pos != -1);
-    Seek(s, pos, SEEK_SET);
+    (void)Seek(s, pos, SEEK_SET);
     Delete(args);
     return 0;
   }
diff --git a/Source/Swig/scanner.c b/Source/Swig/scanner.c
index eec2201a1..8b1c6183e 100644
--- a/Source/Swig/scanner.c
+++ b/Source/Swig/scanner.c
@@ -271,7 +271,7 @@ static void retract(Scanner * s, int n) {
     if (str[l - 1] == '\n') {
       if (!s->freeze_line) s->line--;
     }
-    Seek(s->str, -1, SEEK_CUR);
+    (void)Seek(s->str, -1, SEEK_CUR);
     Delitem(s->text, DOH_END);
   }
 }
@@ -1317,7 +1317,7 @@ void Scanner_locator(Scanner *s, String *loc) {
   } else {
     int c;
     Locator *l;
-    Seek(loc, 7, SEEK_SET);
+    (void)Seek(loc, 7, SEEK_SET);
     c = Getc(loc);
     if (c == '@') {
       /* Empty locator.  We pop the last location off */