diff --git a/xtrn/sbl/sbl.c b/xtrn/sbl/sbl.c
index 047b0bbfcbf6d631b9faff352abc719cce32ad58..b863502b1bab957739f047fc85ba8453ee574d7a 100644
--- a/xtrn/sbl/sbl.c
+++ b/xtrn/sbl/sbl.c
@@ -849,7 +849,7 @@ int main(int argc, char **argv)
 			close(file); }
 
 	if(maint)
-		return;
+		return(0);
 
 	strcpy(list_fmt,DEF_LIST_FMT);
 	while(1) {