diff --git a/ChangeLog b/ChangeLog
index b87771e..fb7baba 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,9 @@
 UNRELEASED  HEAD
 ------------------------------------------------------------------------
 
+  * Fix incorrect boolean logic in src/linux/read.c
+    (Credit: marcos69, closes #5)
+
   * Fix a build failure on mips64el.
     (Credit: YunQiang Su, from Debian Bug #754376)
 
diff --git a/src/linux/read.c b/src/linux/read.c
index 2102631..aa677ae 100644
--- a/src/linux/read.c
+++ b/src/linux/read.c
@@ -204,7 +204,7 @@ evfilt_read_knote_delete(struct filter *filt, struct knote *kn)
     if (kn->kev.flags & EV_DISABLE)
         return (0);
 
-    if ((kn->kn_flags & KNFL_REGULAR_FILE && kn->kdata.kn_eventfd != -1) < 0) {
+    if ((kn->kn_flags & KNFL_REGULAR_FILE) && (kn->kdata.kn_eventfd != -1)) {
         if (epoll_ctl(kn->kn_epollfd, EPOLL_CTL_DEL, kn->kdata.kn_eventfd, NULL) < 0) {
             dbg_perror("epoll_ctl(2)");
             return (-1);