1 files changed, 3 insertions, 1 deletions
diff --git a/bk_whlp.c b/bk_whlp.c
index 9575673..9655b1f 100644
--- a/bk_whlp.c
+++ b/bk_whlp.c
@@ -72,7 +72,7 @@ paragraph *whlp_config_filename(char *filename)
 }
 
 void whlp_backend(paragraph *sourceform, keywordlist *keywords,
-		  indexdata *idx) {
+		  indexdata *idx, void *unused) {
     WHLP h;
     char *filename, *cntname;
     paragraph *p, *lastsect;
@@ -83,6 +83,8 @@ void whlp_backend(paragraph *sourceform, keywordlist *keywords,
     indexentry *ie;
     int done_contents_topic = FALSE;
 
+    IGNORE(unused);
+
     h = state.h = whlp_new();
     state.keywords = keywords;
     state.idx = idx;