diff --git a/include/nuttx/net/iob.h b/include/nuttx/net/iob.h
index 47d533662b..0fbe4f6fc1 100644
--- a/include/nuttx/net/iob.h
+++ b/include/nuttx/net/iob.h
@@ -56,7 +56,7 @@
 
 /* IOB helpers */
 
-#define IOB_DATA(p)      (&(p)-io_data[(p)->io_offset])
+#define IOB_DATA(p)      (&(p)->io_data[(p)->io_offset])
 #define IOB_FREESPACE(p) (CONFIG_IOB_BUFSIZE - (p)->io_len - (p)->io_offset)
 
 /* Queue helpers */