diff --git a/src/expand.c b/src/expand.c
index 467bce5cb..8563a00d4 100644
--- a/src/expand.c
+++ b/src/expand.c
@@ -52,9 +52,6 @@
    allocated for the list of tabstops. */
 #define TABLIST_BLOCK 256
 
-char *xmalloc ();
-char *xrealloc ();
-
 /* The name this program was run with. */
 char *program_name;
 
@@ -142,8 +139,9 @@ add_tabstop (int tabval)
   if (tabval == -1)
     return;
   if (first_free_tab % TABLIST_BLOCK == 0)
-    tab_list = (int *) xrealloc (tab_list, first_free_tab
-				 + TABLIST_BLOCK * sizeof (tab_list[0]));
+    tab_list = (int *) xrealloc ((char *) tab_list,
+				 (first_free_tab
+				  + TABLIST_BLOCK * sizeof (tab_list[0])));
   tab_list[first_free_tab++] = tabval;
 }