diff --git a/crypto/rand/rand.h b/crypto/rand/rand.h
index fd090ea08479c84747dc2ca89d9d13b018c2e118..5d85741452ad464bda0de9450caa91860667105d 100644
--- a/crypto/rand/rand.h
+++ b/crypto/rand/rand.h
@@ -59,13 +59,7 @@
 #ifndef HEADER_RAND_H
 #define HEADER_RAND_H
 
-#include <openssl/e_os2.h>
-
-#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
-#include <windows.h>
-#else
-#include <sys/types.h>
-#endif
+#include <stdlib.h>
 
 #ifdef  __cplusplus
 extern "C" {