diff --git a/src/libtls/tls.c b/src/libtls/tls.c
index ea527b122..3941bea26 100644
--- a/src/libtls/tls.c
+++ b/src/libtls/tls.c
@@ -192,6 +192,14 @@ struct private_tls_t {
 	size_t headpos;
 };
 
+/**
+ * Described in header.
+ */
+void libtls_init(void)
+{
+	/* empty */
+}
+
 METHOD(tls_t, process, status_t,
 	private_tls_t *this, void *buf, size_t buflen)
 {
diff --git a/src/libtls/tls.h b/src/libtls/tls.h
index 54b0621b5..068ba542c 100644
--- a/src/libtls/tls.h
+++ b/src/libtls/tls.h
@@ -227,6 +227,11 @@ struct tls_t {
 	void (*destroy)(tls_t *this);
 };
 
+/**
+ * Dummy libtls initialization function needed for integrity test
+ */
+void libtls_init(void);
+
 /**
  * Create a tls instance.
  *