diff --git a/tests/foo.cc b/tests/foo.cc
index 73b7120..0150c12 100644
--- a/tests/foo.cc
+++ b/tests/foo.cc
@@ -446,7 +446,7 @@ get_set ()
 }
 
 namespace xpto
-{    
+{
     FlowId
     get_flow_id (FlowId flowId)
     {
@@ -563,7 +563,7 @@ ToBeFreed::ToBeFreed(int size) {
 
 ToBeFreed::~ToBeFreed() {
     free(m);
-    m = nullptr;
+    m = NULL;
 }
 
  ToBeFreed::ToBeFreed(const ToBeFreed& from) {
@@ -598,4 +598,4 @@ ToBeFreed *
 return_class_to_not_be_freed(int size)
 {
    return new ToBeFreed(size);
-}
\ No newline at end of file
+}