diff --git a/communication_techniques/include/shared_mem_comm.h b/communication_techniques/include/shared_mem_comm.h
index b50b5f2..95fc539 100644
--- a/communication_techniques/include/shared_mem_comm.h
+++ b/communication_techniques/include/shared_mem_comm.h
@@ -6,7 +6,7 @@
 /* Non standard include */
 #include <common_comm.h>
 
-#define SHARED_SPACE_SIZE (2 * CACHE_LINE_SIZE)
+#define SHARED_SPACE_SIZE (2 * BUF_SIZE)
 
 struct communication_assoc
 {