diff --git a/src/ev_select.c b/src/ev_select.c
index 48a62da..dba5928 100644
--- a/src/ev_select.c
+++ b/src/ev_select.c
@@ -167,6 +167,13 @@
 				if (fdtab[fd].ev & FD_POLL_OUT)
 					fd_ev_set(fd, DIR_WR);
 
+				if (fdtab[fd].spec_p) {
+					/* This fd was already scheduled for being
+					 * called as a speculative I/O.
+					 */
+					continue;
+				}
+
 				fdtab[fd].iocb(fd);
 			}
 		}