diff --git a/apps/plugins/lua/tlsf_helper.c b/apps/plugins/lua/tlsf_helper.c
index 664d87c34e..e0da99f6fb 100644
--- a/apps/plugins/lua/tlsf_helper.c
+++ b/apps/plugins/lua/tlsf_helper.c
@@ -95,5 +95,6 @@ void *get_new_area(size_t *size)
         return audiobuf_ptr;
     }
 
-    return ((void *) ~0);
+    *size = 0;
+    return ((void *) ~0u);
 }
diff --git a/lib/tlsf/src/tlsf.c b/lib/tlsf/src/tlsf.c
index 7943770975..9df176ce16 100644
--- a/lib/tlsf/src/tlsf.c
+++ b/lib/tlsf/src/tlsf.c
@@ -469,7 +469,7 @@ static __inline__ void corrupt(const char *msg) {
 void * __attribute__((weak)) get_new_area(size_t * size)
 {
     (void)size;
-    return ((void *) ~0);
+    return ((void *) ~0u);
 }
 #endif