diff --git a/fips/rand/fingerprint.sha1 b/fips/rand/fingerprint.sha1
index fe576ad6e..19221c2e2 100644
--- a/fips/rand/fingerprint.sha1
+++ b/fips/rand/fingerprint.sha1
@@ -1,2 +1,2 @@
-HMAC-SHA1(fips_rand.c)= 9bf5f5a42a150f5499071c34addab1f351f611ce
+HMAC-SHA1(fips_rand.c)= 204f93068be19786849b817d8f33d500e7cef1d2
 HMAC-SHA1(fips_rand.h)= 0567b1fe9b0efe034a537f335659b0b681809791
diff --git a/fips/rand/fips_rand.c b/fips/rand/fips_rand.c
index e4607c960..b78042b1d 100644
--- a/fips/rand/fips_rand.c
+++ b/fips/rand/fips_rand.c
@@ -51,11 +51,17 @@
  * This is a FIPS approved PRNG, ANSI X9.31 A.2.4.
  */
 
+#include "e_os.h"
+
+/* If we don't define _XOPEN_SOURCE_EXTENDED, struct timeval won't
+   be defined and gettimeofday() won't be declared with strict compilers
+   like DEC C in ANSI C mode.  */
+#define _XOPEN_SOURCE_EXTENDED
+
 #include <openssl/des.h>
 #include <openssl/rand.h>
 #include <openssl/err.h>
 #include <openssl/fips_rand.h>
-#include "e_os.h"
 #ifndef OPENSSL_SYS_WIN32
 #include <sys/time.h>
 #endif