diff --git a/render.c b/render.c
index 026f176f..58a93a33 100644
--- a/render.c
+++ b/render.c
@@ -3,6 +3,7 @@
 #include <string.h>
 #include <wctype.h>
 #include <unistd.h>
+#include <signal.h>
 
 #include <sys/ioctl.h>
 #include <sys/time.h>
@@ -1265,6 +1266,10 @@ render_worker_thread(void *_ctx)
     const int my_id = ctx->my_id;
     free(ctx);
 
+    sigset_t mask;
+    sigfillset(&mask);
+    pthread_sigmask(SIG_SETMASK, &mask, NULL);
+
     char proc_title[16];
     snprintf(proc_title, sizeof(proc_title), "foot:render:%d", my_id);