diff --git a/common.h b/common.h
index 3065459..69e3d64 100644
--- a/common.h
+++ b/common.h
@@ -34,7 +34,7 @@
 #define SEM_USED_SPACE "/sem_used_space_01527193"
 #define SEM_WRITE_END "/sem_write_end_01527193"
 
-#define MAX_ITEMS 32
+#define MAX_ITEMS 16
 
 struct circ_buf {
 	int quit;