diff --git a/dbutils.c b/dbutils.c
index ec3d01b4..e680a54a 100644
--- a/dbutils.c
+++ b/dbutils.c
@@ -1316,6 +1316,17 @@ can_use_pg_rewind(PGconn *conn, const char *data_directory, PQExpBufferData *rea
 {
 	bool can_use = true;
 
+	if (server_version_num == UNKNOWN_SERVER_VERSION_NUM)
+		server_version_num = get_server_version(conn, NULL);
+
+	if (server_version_num < 90500)
+	{
+		appendPQExpBuffer(
+			reason,
+			_("pg_rewind available from PostgreSQL 9.5"));
+		return false;
+	}
+
 	if (guc_set(conn, "full_page_writes", "=", "off"))
 	{
 		if (can_use == false)
diff --git a/repmgr.h b/repmgr.h
index 3b41e39d..27e071fd 100644
--- a/repmgr.h
+++ b/repmgr.h
@@ -26,8 +26,8 @@
 #include "dbutils.h"
 #include "log.h"
 
-#define MIN_SUPPORTED_VERSION		"9.5"
-#define MIN_SUPPORTED_VERSION_NUM	90500
+#define MIN_SUPPORTED_VERSION		"9.4"
+#define MIN_SUPPORTED_VERSION_NUM	90400
 
 #define REPLICATION_TYPE_PHYSICAL 1
 #define REPLICATION_TYPE_BDR	  2