diff --git a/.drone.yml b/.drone.yml
index e1d47af47..023a41696 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -155,7 +155,7 @@ steps:
   image: ubuntu:18.04
   environment:
     CC: gcc
-    COMMON_FLAGS: 'USE_OPENMP=1'
+    COMMON_FLAGS: 'USE_OPENMP=1 BUFFERSIZE=20'
   commands:
     - echo "MAKE_FLAGS:= $COMMON_FLAGS"
     - apt-get update -y