diff --git a/examples/main.c b/examples/main.c
index 6bb16d711cb3d44e8843279e76d4cd24f5ce0cc4..e8278e762751ee956f09a3417a5990613a54dc20 100644
--- a/examples/main.c
+++ b/examples/main.c
@@ -396,6 +396,7 @@ int main(int argc, char *argv[]) {
   /* MATTHIEU: Temporary fix to preserve master */
   if (!with_gravity) {
     free(gparts);
+    gparts = NULL;
     for(size_t k = 0; k < Ngas; ++k)
       parts[k].gpart = NULL;
     Ngpart = 0;