diff --git a/tests/mk-bundle-server.pl b/tests/mk-bundle-server.pl
index 37fff66d53..352048ef50 100755
--- a/tests/mk-bundle-server.pl
+++ b/tests/mk-bundle-server.pl
@@ -39,6 +39,7 @@ foreach my $src (@ARGV) {
 print <<HEADER
 /* !checksrc! disable COPYRIGHT all */
 
+#define MEMDEBUG_NODEFINES
 #include "first.h"
 HEADER
     ;
diff --git a/tests/server/first.c b/tests/server/first.c
index b435162a02..4885896dd4 100644
--- a/tests/server/first.c
+++ b/tests/server/first.c
@@ -25,6 +25,11 @@
 #include <string.h>
 #include "first.h"
 
+#ifdef CURLDEBUG
+#  define MEMDEBUG_NODEFINES
+#  include "memdebug.h"
+#endif
+
 int main(int argc, char **argv)
 {
   main_func_t main_func;