diff --git a/common.h b/common.h
index aa12b14..62e6250 100644
--- a/common.h
+++ b/common.h
@@ -37,6 +37,9 @@
 
 #define MAX_ITEMS 32
 
+/**
+ * @details Struct for circular buffer in shared memory.
+ */
 struct circ_buf {
 	int quit;
 	int head;