1 files changed, 4 insertions, 0 deletions
diff --git a/filter.c b/filter.c
index 3702585..7983737 100644
--- a/filter.c
+++ b/filter.c
@@ -351,6 +351,8 @@ int cgit_open_filter(struct cgit_filter *filter, ...)
  {
          int result;
          va_list ap;
+        if (!filter)
+                return 0;
          va_start(ap, filter);
          result = filter->open(filter, ap);
          va_end(ap);
@@ -359,6 +361,8 @@ int cgit_open_filter(struct cgit_filter *filter, ...)
  
  int cgit_close_filter(struct cgit_filter *filter)
  {
+        if (!filter)
+                return 0;
          return filter->close(filter);
  }