diff --git a/src/template/cygwin b/src/template/cygwin
index e484fe650c6e8958967eca857e6a9cb4414924cd..b6ea0ded522c5a8091808526cae9c6ba04d52df8 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="$LDFLAGS -Wl,--allow-multiple-definition -Wl,--enable-auto-import"
diff --git a/src/template/win32 b/src/template/win32
index dc5b77ec0768a5a90388ce74cf2a59d2b3335965..7da9719acbdacace04dac0cfea3b6a1e6ac2c345 100644
--- a/src/template/win32
+++ b/src/template/win32
@@ -3,4 +3,4 @@
 # --allow-multiple-definition is required to link pg_dump because it finds
 # pg_toupper() etc. in both libpq and pgport
 # --disable-auto-import is to ensure we get MSVC-like linking behavior
-LDFLAGS="-Wl,--allow-multiple-definition -Wl,--disable-auto-import"
+LDFLAGS="$LDFLAGS -Wl,--allow-multiple-definition -Wl,--disable-auto-import"