1 files changed, 5 insertions, 1 deletions
diff --git a/random.c b/random.c
index e73e3dec06..d8b3c7246e 100644
--- a/random.c
+++ b/random.c
@@ -523,6 +523,10 @@ fill_random_bytes_syscall(void *seed, size_t size)
 #elif defined __linux__ && defined SYS_getrandom
 #include <linux/random.h>
 
+# ifndef GRND_NONBLOCK
+#   define GRND_NONBLOCK 0x0001	/* not defined in musl libc */
+# endif
+
 static int
 fill_random_bytes_syscall(void *seed, size_t size)
 {
@@ -530,7 +534,7 @@ fill_random_bytes_syscall(void *seed, size_t size)
     if (try_syscall) {
 	long ret;
 	errno = 0;
-	ret = syscall(SYS_getrandom, seed, size, 0);
+	ret = syscall(SYS_getrandom, seed, size, GRND_NONBLOCK);
 	if (errno == ENOSYS) {
 	    ATOMIC_SET(try_syscall, 0);
 	    return -1;