diff --git a/contrib/pgcrypto/pgcrypto.c b/contrib/pgcrypto/pgcrypto.c
index a441ca7..800ec5a 100644
--- a/contrib/pgcrypto/pgcrypto.c
+++ b/contrib/pgcrypto/pgcrypto.c
@@ -40,6 +40,10 @@
 #include "px-crypt.h"
 #include "pgcrypto.h"
 
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
 PG_MODULE_MAGIC;
 
 /* private stuff */
@@ -424,12 +428,17 @@ pg_random_bytes(PG_FUNCTION_ARGS)
 	int			err;
 	int			len = PG_GETARG_INT32(0);
 	bytea	   *res;
+	struct timeval tv;
 
 	if (len < 1 || len > 1024)
 		ereport(ERROR,
 				(errcode(ERRCODE_EXTERNAL_ROUTINE_INVOCATION_EXCEPTION),
 				 errmsg("Length not in range")));
 
+	/* contribute some entropy to pool */
+	gettimeofday(&tv, NULL);
+	px_add_entropy((uint8 *)&tv, sizeof(tv));
+
 	res = palloc(VARHDRSZ + len);
 	SET_VARSIZE(res, VARHDRSZ + len);
 
diff --git a/contrib/pgcrypto/pgp-pgsql.c b/contrib/pgcrypto/pgp-pgsql.c
index d4eec03..272f439 100644
--- a/contrib/pgcrypto/pgp-pgsql.c
+++ b/contrib/pgcrypto/pgp-pgsql.c
@@ -38,6 +38,10 @@
 #include "px.h"
 #include "pgp.h"
 
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
 /*
  * public functions
  */
@@ -99,6 +103,11 @@ add_entropy(text *data1, text *data2, text *data3)
 {
 	PX_MD	   *md;
 	uint8		rnd[3];
+	struct timeval tv;
+
+	/* always add something to pool */
+	gettimeofday(&tv, NULL);
+	px_add_entropy((uint8 *)&tv, sizeof(tv));
 
 	if (!data1 && !data2 && !data3)
 		return;