diff --git a/testsuites/libtests/dl10/dl10-o6.c b/testsuites/libtests/dl10/dl10-o6.c
index ab6deb189d..2ac80277f5 100644
--- a/testsuites/libtests/dl10/dl10-o6.c
+++ b/testsuites/libtests/dl10/dl10-o6.c
@@ -7,6 +7,7 @@
  */
 
 #include "dl-load.h"
+#include "dl-o5.h"
 
 #include <inttypes.h>
 #include <rtems/test-info.h>