diff --git a/configure b/configure
index ace4ed5decf..3e3fd389dc6 100755
--- a/configure
+++ b/configure
@@ -19192,8 +19192,10 @@ _ACEOF
 # literally, so that it's possible to override it at build time using
 # a command like "make ... PG_SYSROOT=path".  This has to be done after
 # we've finished all configure checks that depend on CPPFLAGS.
+# The same for LDFLAGS, too.
 if test x"$PG_SYSROOT" != x; then
   CPPFLAGS=`echo "$CPPFLAGS" | sed -e "s| $PG_SYSROOT | \\\$(PG_SYSROOT) |"`
+  LDFLAGS=`echo "$LDFLAGS" | sed -e "s| $PG_SYSROOT | \\\$(PG_SYSROOT) |"`
 fi
 
 
diff --git a/configure.ac b/configure.ac
index 5b91c83fd07..8fee479fb79 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2360,8 +2360,10 @@ AC_SUBST(PG_VERSION_NUM)
 # literally, so that it's possible to override it at build time using
 # a command like "make ... PG_SYSROOT=path".  This has to be done after
 # we've finished all configure checks that depend on CPPFLAGS.
+# The same for LDFLAGS, too.
 if test x"$PG_SYSROOT" != x; then
   CPPFLAGS=`echo "$CPPFLAGS" | sed -e "s| $PG_SYSROOT | \\\$(PG_SYSROOT) |"`
+  LDFLAGS=`echo "$LDFLAGS" | sed -e "s| $PG_SYSROOT | \\\$(PG_SYSROOT) |"`
 fi
 AC_SUBST(PG_SYSROOT)
 
diff --git a/src/template/darwin b/src/template/darwin
index f4d4e9d7cf8..32414d21a98 100644
--- a/src/template/darwin
+++ b/src/template/darwin
@@ -11,6 +11,7 @@ fi
 if test x"$PG_SYSROOT" != x"" ; then
   if test -d "$PG_SYSROOT" ; then
     CPPFLAGS="-isysroot $PG_SYSROOT $CPPFLAGS"
+    LDFLAGS="-isysroot $PG_SYSROOT $LDFLAGS"
   else
     PG_SYSROOT=""
   fi