diff --git a/hwaccess.c b/hwaccess.c
index 8c89925..51e113e 100644
--- a/hwaccess.c
+++ b/hwaccess.c
@@ -116,6 +116,20 @@
 {
 }
 
+#elif defined (__arm__)
+
+static inline void sync_primitive(void)
+{
+}
+
+void get_io_perms(void)
+{
+}
+
+void release_io_perms(void)
+{
+}
+
 #else
 
 #error Unknown architecture