diff --git a/build-scripts/wikiheaders.pl b/build-scripts/wikiheaders.pl
index 83a764875b..b185c0ddfc 100755
--- a/build-scripts/wikiheaders.pl
+++ b/build-scripts/wikiheaders.pl
@@ -1707,6 +1707,7 @@ if ($copy_direction == 1) {  # --copy-to-headers
         if ($wikitype eq 'mediawiki') {
             $syntax = "<syntaxhighlight lang='c'>\n$decl</syntaxhighlight>\n";
         } elsif ($wikitype eq 'md') {
+            $decl =~ s/\n+\Z//;
             $syntax = "```c\n$decl\n```\n";
         } else { die("Expected wikitype '$wikitype'"); }