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-rw-r--r--src/ui/mucconfwin.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/ui/mucconfwin.c b/src/ui/mucconfwin.c
index 2a4576a1..12850e1a 100644
--- a/src/ui/mucconfwin.c
+++ b/src/ui/mucconfwin.c
@@ -102,6 +102,8 @@ mucconfwin_handle_configuration(const char *const roomjid, DataForm *form)
 void
 mucconfwin_field_help(ProfMucConfWin *confwin, char *tag)
 {
+    assert(confwin != NULL);
+
     ProfWin *window = (ProfWin*) confwin;
     FormField *field = form_get_field_by_tag(confwin->form, tag);
     if (field) {