diff --git a/crypto/rand/randfile.c b/crypto/rand/randfile.c
index 030e07f41..d30f6f1e7 100644
--- a/crypto/rand/randfile.c
+++ b/crypto/rand/randfile.c
@@ -77,6 +77,7 @@
 #endif
 #ifndef OPENSSL_NO_POSIX_IO
 # include <sys/stat.h>
+# include <fcntl.h>
 #endif
 
 #ifdef _WIN32