diff --git a/repos/base/src/test/sanitizer/main.cc b/repos/base/src/test/sanitizer/main.cc
index accc3c0fe..022edceb9 100644
--- a/repos/base/src/test/sanitizer/main.cc
+++ b/repos/base/src/test/sanitizer/main.cc
@@ -23,7 +23,7 @@ void Component::construct(Genode::Env &env)
 
 	/* test array out-of-bounds access detection */
 
-	int array[1];
+	int array[1] = { 0 };
 	int volatile i = 2;
 	Genode::log("array[", i, "] = ", array[i]);