diff --git a/src/backend/port/dynloader/sunos4.c b/src/backend/port/dynloader/sunos4.c
new file mode 100644
index 00000000000..08dd9746dda
--- /dev/null
+++ b/src/backend/port/dynloader/sunos4.c
@@ -0,0 +1,4 @@
+/* Dummy file used for nothing at this point
+ *
+ * see sunos4.h
+ */