--- a/src/wps/Makefile
+++ b/src/wps/Makefile
@@ -1,34 +1,34 @@
-CC=gcc
+CC?=gcc
 INC=-I../utils -I ../
 
 all: wps_attr_build.o wps_attr_parse.o wps_attr_process.o wps.o wps_common.o wps_dev_attr.o wps_enrollee.o wps_registrar.o wps_ufd.o
 
 wps_attr_build.o:
-	$(CC) $(INC) wps_attr_build.c -c
+	$(CC) $(CFLAGS) $(INC) wps_attr_build.c -c
 
 wps_attr_parse.o:
-	$(CC) $(INC) wps_attr_parse.c -c
+	$(CC) $(CFLAGS) $(INC) wps_attr_parse.c -c
 
 wps_attr_process.o:
-	$(CC) $(INC) wps_attr_process.c -c
+	$(CC) $(CFLAGS) $(INC) wps_attr_process.c -c
 
 wps.o:
-	$(CC) $(INC) wps.c -c
+	$(CC) $(CFLAGS) $(INC) wps.c -c
 
 wps_common.o:
-	$(CC) $(INC) wps_common.c -c
+	$(CC) $(CFLAGS) $(INC) wps_common.c -c
 
 wps_dev_attr.o:
-	$(CC) $(INC) wps_dev_attr.c -c
+	$(CC) $(CFLAGS) $(INC) wps_dev_attr.c -c
 
 wps_enrollee.o:
-	$(CC) $(INC) wps_enrollee.c -c
+	$(CC) $(CFLAGS) $(INC) wps_enrollee.c -c
 
 wps_registrar.o:
-	$(CC) $(INC) wps_registrar.c -c
+	$(CC) $(CFLAGS) $(INC) wps_registrar.c -c
 
 wps_ufd.o:
-	$(CC) $(INC) wps_ufd.c -c
+	$(CC) $(CFLAGS) $(INC) wps_ufd.c -c
 
 clean:
 	rm -f *.o