diff --git a/src/backend/utils/init/miscinit.c b/src/backend/utils/init/miscinit.c
index 865119d..f003831 100644
--- a/src/backend/utils/init/miscinit.c
+++ b/src/backend/utils/init/miscinit.c
@@ -325,6 +325,8 @@ InitStandaloneProcess(const char *argv0)
 
 	MyStartTime = time(NULL);	/* set our start time in case we call elog */
 
+	srandom((unsigned int) (MyProcPid ^ MyStartTime));
+
 	/* Initialize process-local latch support */
 	InitializeLatchSupport();
 	MyLatch = &LocalLatchData;
diff --git a/src/bin/initdb/initdb.c b/src/bin/initdb/initdb.c
index 32746c7..83f4b0b 100644
--- a/src/bin/initdb/initdb.c
+++ b/src/bin/initdb/initdb.c
@@ -922,6 +922,8 @@ choose_dsm_implementation(void)
 #ifdef HAVE_SHM_OPEN
 	int			ntries = 10;
 
+	srandom((unsigned int) (getpid() ^ time(NULL)));
+
 	while (ntries > 0)
 	{
 		uint32		handle;