diff --git a/testsuites/libtests/malloctest/task1.c b/testsuites/libtests/malloctest/task1.c
index fa9cef4640..289016f1bf 100644
--- a/testsuites/libtests/malloctest/task1.c
+++ b/testsuites/libtests/malloctest/task1.c
@@ -18,6 +18,9 @@
 #include <string.h>
 #include <stdlib.h>
 
+/* HACK: Blatant visibility violation */
+extern void malloc_walk(size_t source, size_t printf_enabled);
+
 #define NUM_PASSES 100
 
 rtems_task Task_1_through_5(