diff --git a/src/os/unix/ngx_recv.c b/src/os/unix/ngx_recv.c
index 6f01ab3..a906430 100644
--- a/src/os/unix/ngx_recv.c
+++ b/src/os/unix/ngx_recv.c
@@ -60,7 +60,7 @@
                 rev->available -= n;
 
                 /*
-                 * rev->available can be negative here because some additional
+                 * rev->available may be negative here because some additional
                  * bytes can be received between kevent() and recv()
                  */