Index: src/interfaces/libpq/Makefile
--- src/interfaces/libpq/Makefile.orig
+++ src/interfaces/libpq/Makefile
@@ -19,8 +19,8 @@ PGFILEDESC = "PostgreSQL Access Library"
 
 # shared library parameters
 NAME= pq
-SO_MAJOR_VERSION= 5
-SO_MINOR_VERSION= $(MAJORVERSION)
+SO_MAJOR_VERSION= ${LIBpq_MAJOR}
+SO_MINOR_VERSION= ${LIBpq_MINOR}
 
 override CPPFLAGS :=  -I$(srcdir) $(CPPFLAGS) -I$(top_builddir)/src/port -I$(top_srcdir)/src/port
 ifneq ($(PORTNAME), win32)
