diff --git a/miniupnpc/Makefile.mingw b/miniupnpc/Makefile.mingw
index 9fd262c..3c01a70 100644
--- a/miniupnpc/Makefile.mingw
+++ b/miniupnpc/Makefile.mingw
@@ -21,15 +21,18 @@ RM = del
 else
 RM = rm -f
 endif
-#CFLAGS = -Wall -g
-#CPPFLAGS = -DDEBUG -D_WIN32_WINNT=0X501
-CFLAGS = -Wall -W -Wstrict-prototypes -Os
-CPPFLAGS = -DNDEBUG -D_WIN32_WINNT=0X501
+
+CFLAGS ?= -Os
+CFLAGS += -Wall
+CFLAGS += -W -Wstrict-prototypes
+
+CPPFLAGS += -DNDEBUG -D_WIN32_WINNT=0X501
 CPPFLAGS += -Iinclude
 CPPFLAGS += -I.
-LDLIBS = -lws2_32 -liphlpapi
-# -lwsock32
+
 # -liphlpapi is needed for GetBestRoute() and GetIpAddrTable()
+LDLIBS = -lws2_32 -liphlpapi
+
 PYTHON=\utils\python25\python
 OBJS=miniwget.o minixml.o igd_desc_parse.o minisoap.o \
      minissdpc.o \