diff --git a/isisd/isis_flags.c b/isisd/isis_flags.c
index 03c9110..ec0eaa4 100644
--- a/isisd/isis_flags.c
+++ b/isisd/isis_flags.c
@@ -36,11 +36,11 @@
   flags->free_idcs = NULL;
 }
 
-int
+long int
 flags_get_index (struct flags *flags)
 {
   struct listnode *node;
-  int index;
+  long int index;
 
   if (flags->free_idcs == NULL || flags->free_idcs->count == 0)
     {
@@ -49,7 +49,7 @@
   else
     {
       node = listhead (flags->free_idcs);
-      index = (int) listgetdata (node);
+      index = (long int) listgetdata (node);
       listnode_delete (flags->free_idcs, (void *) index);
       index--;
     }
@@ -58,7 +58,7 @@
 }
 
 void
-flags_free_index (struct flags *flags, int index)
+flags_free_index (struct flags *flags, long int index)
 {
   if (index + 1 == flags->maxindex)
     {