diff --git a/mongoose.h b/mongoose.h
index bc8fd0ce..d4a31cc2 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -2213,7 +2213,6 @@ struct mg_connection {
   unsigned is_resp : 1;        // Response is still being generated
   unsigned is_readable : 1;    // Connection is ready to read
   unsigned is_writable : 1;    // Connection is ready to write
-  unsigned is_io_err : 1;      // Remember IO_ERR condition for later use
 };
 
 void mg_mgr_poll(struct mg_mgr *, int ms);
diff --git a/src/net.h b/src/net.h
index c59f6216..679dc5b2 100644
--- a/src/net.h
+++ b/src/net.h
@@ -76,7 +76,6 @@ struct mg_connection {
   unsigned is_resp : 1;        // Response is still being generated
   unsigned is_readable : 1;    // Connection is ready to read
   unsigned is_writable : 1;    // Connection is ready to write
-  unsigned is_io_err : 1;      // Remember IO_ERR condition for later use
 };
 
 void mg_mgr_poll(struct mg_mgr *, int ms);