diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
index cbce480eab2..a48b6d4feb0 100644
--- a/src/backend/tcop/postgres.c
+++ b/src/backend/tcop/postgres.c
@@ -4009,6 +4009,11 @@ PostgresSingleUserMain(int argc, char *argv[],
 	/* read control file (error checking and contains config ) */
 	LocalProcessControlFile(false);
 
+	/*
+	 * process any libraries that should be preloaded at postmaster start
+	 */
+	process_shared_preload_libraries();
+
 	/* Initialize MaxBackends */
 	InitializeMaxBackends();