diff --git a/src/template/cygwin b/src/template/cygwin
index e484fe6..b6ea0de 100644
--- a/src/template/cygwin
+++ b/src/template/cygwin
@@ -6,4 +6,4 @@ SRCH_LIB="/usr/local/lib"
 # pg_toupper() etc. in both libpq and pgport
 # we'd prefer to use --disable-auto-import to match MSVC linking behavior,
 # but support for it in Cygwin is too haphazard
-LDFLAGS="-Wl,--allow-multiple-definition -Wl,--enable-auto-import"
+LDFLAGS="$LDFLAGS -Wl,--allow-multiple-definition -Wl,--enable-auto-import"
diff --git a/src/template/win32 b/src/template/win32
index dc5b77e..7da9719 100644
--- a/src/template/win32
+++ b/src/template/win32
@@ -3,4 +3,4 @@
 # --allow-multiple-definition is required to link pg_dump because it finds
 # pg_toupper() etc. in both libpq and pgport
 # --disable-auto-import is to ensure we get MSVC-like linking behavior
-LDFLAGS="-Wl,--allow-multiple-definition -Wl,--disable-auto-import"
+LDFLAGS="$LDFLAGS -Wl,--allow-multiple-definition -Wl,--disable-auto-import"