diff --git a/src/media.c b/src/media.c
index e3a1bcc..7bf2cc8 100644
--- a/src/media.c
+++ b/src/media.c
@@ -26,7 +26,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
-#include <sys/select.h>
+#include <poll.h>
 
 #include <linux/media.h>
 
@@ -78,19 +78,19 @@ int media_request_queue(int request_fd)
 
 int media_request_wait_completion(int request_fd)
 {
-	struct timeval tv = { 0, 300000 };
-	fd_set except_fds;
+	/* poll() instead of select(): Firefox's RDD seccomp policy admits
+	 * poll/ppoll but not select/pselect6 (as of FF150). Functionally
+	 * equivalent here — the media request fd signals completion via
+	 * exceptional condition, mapped to POLLPRI for poll(). */
+	struct pollfd pfd = { .fd = request_fd, .events = POLLPRI };
 	int rc;
 
-	FD_ZERO(&except_fds);
-	FD_SET(request_fd, &except_fds);
-
-	rc = select(request_fd + 1, NULL, NULL, &except_fds, &tv);
+	rc = poll(&pfd, 1, 300 /* ms */);
 	if (rc == 0) {
 		request_log("Timeout when waiting for media request\n");
 		return -1;
 	} else if (rc < 0) {
-		request_log("Unable to select media request: %s\n",
+		request_log("Unable to poll media request: %s\n",
 			    strerror(errno));
 		return -1;
 	}