diff --git a/src/interfaces/libpq/libpqdll.def b/src/interfaces/libpq/libpqdll.def
index 7cf3bbc0a4..32b0fa6ec3 100644
--- a/src/interfaces/libpq/libpqdll.def
+++ b/src/interfaces/libpq/libpqdll.def
@@ -79,4 +79,3 @@ EXPORTS
 	destroyPQExpBuffer	@ 76
 	createPQExpBuffer	@ 77
 	PQconninfoFree		@ 78
-	PQunixsocket		@ 79