diff --git a/3rdparty/dear-imgui/widgets/markdown.h b/3rdparty/dear-imgui/widgets/markdown.h
index a594297aa..05207f7b5 100644
--- a/3rdparty/dear-imgui/widgets/markdown.h
+++ b/3rdparty/dear-imgui/widgets/markdown.h
@@ -138,7 +138,7 @@ namespace ImGui
 
         MarkdownLinkCallback* linkCallback = 0;
         const char* linkIcon = "";
-        HeadingFormat headingFormats[ NUMHEADINGS ] = { NULL, true, NULL, true, NULL, true };
+        HeadingFormat headingFormats[ NUMHEADINGS ] = { { NULL, true }, { NULL, true }, { NULL, true } };
     };
 
     // External interface