diff --git a/config-mingw.mk b/config-mingw.mk
index 0746d0c5..f825d57f 100644
--- a/config-mingw.mk
+++ b/config-mingw.mk
@@ -20,12 +20,11 @@
 
 CFLAGS=-g --std=gnu89
 LINKFLAGS=-lm
-LIBS = -lws2_32
 TESTS=test/echo-server.c test/test-*.c
 BENCHMARKS=test/echo-server.c test/benchmark-*.c
 
 RUNNER_CFLAGS=$(CFLAGS) -D_GNU_SOURCE # Need _GNU_SOURCE for strdup?
-RUNNER_LINKFLAGS=$(LINKFLAGS)
+RUNNER_LINKFLAGS=$(LINKFLAGS) -lws2_32
 RUNNER_SRC=test/runner-win.c
 
 oio.a: oio-win.o 
diff --git a/config-unix.mk b/config-unix.mk
index c67e2156..bd0cb85d 100644
--- a/config-unix.mk
+++ b/config-unix.mk
@@ -20,7 +20,6 @@
 
 CFLAGS=--std=gnu89 -g
 LINKFLAGS=-lm
-LIBS=
 TESTS=test/echo-server.c test/test-*.c
 BENCHMARKS=test/echo-server.c test/benchmark-*.c